This is a cleanup listing for WikiProject Chemistry generated on 6 May 2013, 5:35:40 UTC.
Of the 7097 articles in this project 2322 or 32.7 % are marked for cleanup, with 3518 issues in total.
| Article | Importance | Class | Count | Oldest month | Categories |
|---|---|---|---|---|---|
| -ase | Low | Stub | 1 | August 2009 | Articles lacking sources (August 2009) |
| -ose | Low | Stub | 1 | December 2012 | Articles needing additional references (December 2012) |
| 1,3,2,4-Dithiadiphosphetane 2,4-disulfides | Low | Start | 2 | September 2007 | Articles lacking sources (September 2007), Articles with unsourced statements (September 2007) |
| 1s Slater-type function | Low | Start | 4 | July 2012 | Wikipedia pages needing cleanup (November 2012), Articles needing cleanup (November 2012), Wikipedia articles that are too technical (July 2012), All articles needing expert attention |
| 2-(Dicyanomethylene)croconate | Low | Stub | 1 | June 2011 | Articles with unsourced statements (June 2011) |
| 3-aza-Grob fragmentation | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| 4+3 cycloaddition | Mid | C | 2 | October 2010 | Wikipedia articles needing context (October 2010), Wikipedia introduction cleanup (October 2010) |
| 4-Methanolquinoline | Low | Stub | 1 | March 2013 | Articles lacking sources (March 2013) |
| 4-Piperidinone | Low | Stub | 1 | September 2007 | Articles needing additional references (September 2007) |
| 6111 aluminium alloy | Low | Stub | 1 | February 2013 | Articles lacking sources (February 2013) |
| Abelsonite | Low | Start | 1 | Articles containing potentially dated statements (1990) | |
| Abraham Savitzky | Low | Stub | 1 | September 2012 | Articles needing additional references (September 2012) |
| Absolute molar mass | Mid | Start | 1 | July 2008 | Articles lacking sources (July 2008) |
| Absorption (chemistry) | Mid | Stub | 1 | December 2007 | Articles with unsourced statements (December 2007) |
| Abundance (chemistry) | Mid | Stub | 1 | November 2009 | Articles needing additional references (November 2009) |
| Abyssinian gold | Low | Stub | 1 | September 2011 | Orphaned articles (September 2011) |
| Accessory pigment | Low | Start | 1 | August 2007 | Articles with unsourced statements (August 2007) |
| Acetoxy group | Mid | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Acetyl | High | Start | 2 | September 2009 | Articles with unsourced statements (July 2011, September 2009) |
| Achille Müntz | Low | Stub | 1 | Persondata templates without short description parameter | |
| Acicular ferrite | Low | Stub | 1 | October 2009 | Articles needing additional references (October 2009) |
| Acid | Top | B | 1 | May 2009 | Articles lacking in-text citations (May 2009) |
| Acid dye | Low | Stub | 3 | December 2009 | Articles to be expanded (July 2010), Articles lacking sources (December 2009), Articles with unsourced statements (March 2011) |
| Acid radical | Low | Stub | 1 | March 2011 | Articles to be merged (March 2011) |
| Acid strength | High | B | 1 | June 2009 | Articles with unsourced statements (June 2009) |
| Acid value | Low | C | 1 | December 2009 | Articles lacking sources (December 2009) |
| Acrylate polymer | Low | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Acrylic paint | Low | Start | 2 | November 2009 | Articles that may contain original research (June 2010), Articles needing additional references (November 2009) |
| Acryloyl group | High | Stub | 2 | June 2009 | Articles lacking sources (June 2009, March 2010) |
| ACS Chemical Biology | Mid | C | 1 | October 2010 | Articles with dead external links (October 2010) |
| ACS Chemical Neuroscience | Low | C | 1 | February 2011 | Articles that may contain original research (February 2011) |
| Action spectrum | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Activated carbon | Mid | C | 5 | April 2009 | Wikipedia introduction cleanup (September 2012), Articles with unsourced statements (April 2009, August 2011, February 2012, May 2009) |
| Activating agent | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Activating group | Low | Start | 1 | February 2011 | Articles to be merged (February 2011) |
| Activation energy | Mid | B | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| Active methylene compounds | Mid | Stub | 3 | May 2012 | Articles to be expanded (May 2012), Orphaned articles (June 2012), All articles needing expert attention |
| Acylglyceride linkage | Low | Stub | 1 | December 2008 | Orphaned articles (December 2008) |
| Acyl chloride | Mid | B | 1 | April 2013 | Articles to be merged (April 2013) |
| Acyl halide | Mid | Start | 1 | April 2013 | Articles to be merged (April 2013) |
| Adamkeiwickz reaction | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Adam S. Veige | Unknown | Start | 2 | January 2012 | Wikipedia introduction cleanup (January 2012), Orphaned articles (December 2012) |
| Ada Yonath | Mid | C | 1 | December 2009 | Articles with unsourced statements (December 2009) |
| Adhesive | Mid | C | 1 | May 2010 | Articles with unsourced statements (May 2010) |
| Adipate | Mid | Stub | 1 | March 2011 | Articles lacking sources (March 2011) |
| Adolf Butenandt | High | Start | 2 | December 2012 | Articles with unsourced statements (December 2012), Persondata templates without short description parameter |
| Adolf Karl Ludwig Claus | Low | C | 1 | Persondata templates without short description parameter | |
| Adolf Otto Reinhold Windaus | High | Start | 2 | September 2011 | Articles to be expanded (December 2012), Articles with unsourced statements (September 2011) |
| Adolf von Baeyer | High | Start | 1 | October 2010 | Articles with dead external links (October 2010) |
| Adolph Wilhelm Hermann Kolbe | High | Start | 1 | Persondata templates without short description parameter | |
| Adulterant | Low | Start | 1 | November 2009 | Articles with unsourced statements (November 2009) |
| Aerosol | Mid | C | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| Affinity electrophoresis | Low | Stub | 1 | September 2011 | Articles lacking sources (September 2011) |
| Affinity label | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Agelasimine | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Aimé Girard | Low | Stub | 1 | Persondata templates without short description parameter | |
| Air freshener | Low | Start | 1 | April 2013 | Wikipedia introduction cleanup (April 2013) |
| Akabori amino-acid reaction | Low | Start | 1 | February 2009 | Orphaned articles (February 2009) |
| Akira Ogata | Unknown | Unassessed | 1 | January 2009 | Articles lacking sources (January 2009) |
| Alan Carrington | Low | Stub | 1 | Persondata templates without short description parameter | |
| Aldaric acid | Mid | Start | 1 | December 2012 | Articles needing additional references (December 2012) |
| Aldol reaction | High | FA | 1 | April 2011 | Vague or ambiguous time (April 2011) |
| Aleksandr Arbuzov | Low | Stub | 1 | Persondata templates without short description parameter | |
| Aleksandr Loran | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Aleksei Chichibabin | Low | Start | 1 | Persondata templates without short description parameter | |
| Alessandro Vaciago | Low | Start | 1 | April 2009 | Orphaned articles (April 2009) |
| Alexander Butlerov | High | Stub | 2 | April 2011 | Articles to be expanded (April 2011), Persondata templates without short description parameter |
| Alexander J. Fatiadi | Low | Stub | 1 | Persondata templates without short description parameter | |
| Alexander Mitscherlich | Low | Stub | 2 | December 2009 | Articles lacking sources (December 2009), Persondata templates without short description parameter |
| Alexander Parkes | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Alexander Selligue | Low | Stub | 1 | Persondata templates without short description parameter | |
| Alexander William Bickerton | Low | C | 1 | Persondata templates without short description parameter | |
| Alexandre-Émile Béguyer de Chancourtois | Mid | B | 1 | Persondata templates without short description parameter | |
| Alexey Favorsky | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Alexis Pappas | Mid | Start | 1 | Persondata templates without short description parameter | |
| Alfred Lauck Parson | Low | Start | 1 | Persondata templates without short description parameter | |
| Alk- | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Alkali | High | Start | 1 | June 2008 | Articles needing additional references (June 2008) |
| Alkaline battery | Mid | C | 1 | February 2013 | Articles with unsourced statements (February 2013) |
| Alkali anion exchange membrane | Low | Stub | 1 | February 2012 | Articles with dead external links (February 2012) |
| Alkali metal oxide | Mid | Stub | 1 | August 2012 | Articles needing additional references (August 2012) |
| Alkali salt | Mid | Start | 1 | April 2011 | Articles needing additional references (April 2011) |
| Alkaloid | Top | B | 1 | March 2013 | Articles with dead external links (March 2013) |
| Alkane | Top | B | 2 | April 2007 | Articles with dead external links (March 2013), Articles with unsourced statements (April 2007) |
| Alkoxy group | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Alkyl | Mid | Start | 1 | January 2013 | Articles to be merged (January 2013) |
| Alkylation | Mid | Start | 1 | January 2013 | Articles with unsourced statements (January 2013) |
| Alkyl cycloalkane | Mid | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Alkyl nitrites | Mid | Start | 1 | January 2013 | Articles to be merged (January 2013) |
| Alkyl phosphate | Mid | Stub | 3 | February 2009 | Articles to be merged (February 2011), Orphaned articles (February 2009), Articles lacking sources (May 2009) |
| Allethrins | Low | Start | 1 | July 2012 | Articles with unsourced statements (July 2012) |
| Allotropes of phosphorus | High | B | 1 | March 2013 | Articles to be expanded (March 2013) |
| Allotropy | Low | C | 2 | May 2009 | Articles with dead external links (February 2011), Articles to be expanded (May 2009) |
| Allylic stannane addition | Low | C | 1 | November 2011 | Orphaned articles (November 2011) |
| Alpha factor | Low | Start | 1 | August 2011 | Articles lacking sources (August 2011) |
| Alpha hydroxy acid | Mid | Start | 1 | June 2009 | Articles needing additional references (June 2009) |
| Alton E. Bailey | Low | Stub | 1 | Persondata templates without short description parameter | |
| Aluminide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Aluminium acetate | Mid | Stub | 1 | All articles needing expert attention | |
| Aluminium amalgam | Low | Start | 2 | June 2009 | Articles with unsourced statements (February 2012, June 2009) |
| Aluminium smelting | Mid | Start | 1 | August 2007 | Articles lacking sources (August 2007) |
| Aluminoxane | Low | Stub | 1 | February 2008 | Articles lacking sources (February 2008) |
| Alvin Joseph Melveger | Low | Stub | 2 | December 2010 | Articles with topics of unclear notability (December 2010), Persondata templates without short description parameter |
| Alwin Mittasch | Low | Stub | 1 | Persondata templates without short description parameter | |
| Amalgam (chemistry) | Mid | Start | 4 | April 2009 | Articles to be expanded (April 2009, July 2011), Wikipedia introduction cleanup (August 2012), Articles with unsourced statements (July 2011) |
| American Chemistry Council | Low | Start | 5 | December 2008 | NPOV disputes (October 2011), Articles needing additional references (December 2008), Articles with unsourced statements (October 2011), Articles with specifically marked weasel-worded phrases (October 2011), Articles with obsolete information (October 2011) |
| Amide reduction | Mid | Stub | 2 | January 2011 | Wikipedia pages needing cleanup (January 2011), Articles needing cleanup (January 2011) |
| Aminal | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Amination | Low | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Aminoacylation | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Aminolysis | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Aminoquinoline | Low | Stub | 1 | September 2008 | Articles lacking sources (September 2008) |
| Amino acid neurotransmitter | Low | Start | 1 | January 2011 | Orphaned articles (January 2011) |
| Amino radical | Low | Stub | 1 | December 2011 | Orphaned articles (December 2011) |
| Amir H. Hoveyda | Low | Stub | 1 | Persondata templates without short description parameter | |
| Amorphism | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Amorphous metal | Low | Start | 5 | March 2011 | Wikipedia articles needing clarification (April 2012), Articles needing additional references (April 2012), Articles with unsourced statements (January 2012, March 2011, May 2012) |
| Amount of substance | High | C | 1 | May 2009 | Articles with dead external links (May 2009) |
| Amperometric titration | Mid | Start | 1 | March 2011 | Wikipedia articles needing rewrite (March 2011) |
| Amphichromatic | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Amy Rosenzweig | Low | Stub | 1 | Persondata templates without short description parameter | |
| Anaerobic glycolysis | Low | Stub | 2 | December 2009 | Articles to be merged (April 2011), Articles lacking sources (December 2009) |
| Anaglypta | Low | Stub | 1 | August 2012 | Wikipedia articles needing rewrite (August 2012) |
| Analyte | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Analyte-specific reagent | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Analytical chemistry | Top | Start | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| Analytical Methods (journal) | Low | Start | 1 | July 2011 | Orphaned articles (July 2011) |
| Anal pore | Low | Stub | 1 | July 2011 | Articles lacking sources (July 2011) |
| Anat Blumenfeld | Low | Stub | 1 | Persondata templates without short description parameter | |
| André Dreiding | Unknown | Start | 1 | Persondata templates without short description parameter | |
| Andreas Libavius | Low | Stub | 1 | Persondata templates without short description parameter | |
| Andreas Sigismund Marggraf | Mid | C | 1 | Persondata templates without short description parameter | |
| Angstrom | Mid | Start | 1 | September 2010 | Articles with unsourced statements (September 2010) |
| Anhydrous | High | Stub | 2 | June 2010 | Articles with dead external links (June 2010), Articles needing additional references (June 2010) |
| Animesh Chakravorty | Low | Stub | 1 | Persondata templates without short description parameter | |
| Anna J. Harrison | Unknown | Stub | 1 | November 2012 | Articles needing additional references (November 2012) |
| Anode | Mid | Start | 1 | September 2012 | Articles needing additional references (September 2012) |
| Anodizing | Mid | Start | 2 | March 2009 | Articles to be expanded (March 2009), Articles with unsourced statements (November 2010) |
| Antagonism (chemistry) | Low | Stub | 1 | December 2012 | Articles needing additional references (December 2012) |
| Antanas Purėnas | Low | Stub | 1 | Persondata templates without short description parameter | |
| Anthocyanin | Mid | B | 2 | May 2008 | Articles with unsourced statements (August 2012, May 2008) |
| Anthony Cheetham | Low | Stub | 1 | Persondata templates without short description parameter | |
| Anthony F. Hill | Low | Stub | 2 | May 2010 | Articles lacking reliable references (May 2010), Persondata templates without short description parameter |
| Anti-corrosion | Mid | Start | 2 | October 2009 | Articles lacking sources (October 2009), All articles needing expert attention |
| Anti-fouling paint | Low | Start | 1 | August 2012 | Articles with dead external links (August 2012) |
| Anti-phase domain | Low | Stub | 1 | September 2010 | Orphaned articles (September 2010) |
| Antiaromaticity | High | C | 3 | February 2007 | Wikipedia articles that are too technical (September 2010), Articles with unsourced statements (February 2007), All articles needing expert attention |
| Antibonding | High | Start | 2 | August 2012 | Articles lacking in-text citations (August 2012), Articles needing additional references (August 2012) |
| Antichlor | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles needing additional references (December 2009) |
| Antifreeze | Mid | B | 3 | March 2009 | Articles with dead external links (January 2011), Articles with unsourced statements (March 2009, November 2010) |
| Antihydrogen | Low | C | 1 | March 2012 | Articles with unsourced statements (March 2012) |
| Antimonate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Antiozonant | Low | Stub | 2 | December 2012 | Articles with unsourced statements (December 2012, February 2013) |
| Antisymmetric exchange | Low | Stub | 3 | February 2012 | Wikipedia articles needing context (February 2012), Wikipedia introduction cleanup (February 2012), Articles lacking sources (February 2012) |
| Antoine Lavoisier | High | C | 1 | February 2013 | Articles with unsourced statements (February 2013) |
| Antonín Holý | Low | Start | 1 | Persondata templates without short description parameter | |
| Ap4A | Low | Stub | 1 | February 2010 | Articles needing additional references (February 2010) |
| Apollo Mussin-Pushkin | Low | Stub | 2 | December 2009 | Articles needing additional references (December 2009), Persondata templates without short description parameter |
| Aqua regia | Mid | C | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| Aqueous normal-phase chromatography | Mid | Stub | 1 | February 2011 | Articles with unsourced statements (February 2011) |
| Aqueous solution | High | Stub | 1 | April 2011 | Articles needing additional references (April 2011) |
| Arabinogalactan | Low | Start | 1 | December 2011 | Articles with unsourced statements (December 2011) |
| Archibald Macallum | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Argos (EGFR Inhibitor) | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Arieh Ben-Naim | Low | Start | 2 | December 2009 | Articles lacking reliable references (December 2009), Persondata templates without short description parameter |
| Ariel Fenster | Low | Stub | 1 | Persondata templates without short description parameter | |
| Armand de Waele | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Arne Tiselius | High | Start | 1 | October 2009 | Articles lacking in-text citations (October 2009) |
| Arnold Eucken | Low | Stub | 1 | Persondata templates without short description parameter | |
| Aromatic amine | Low | Start | 1 | February 2013 | Articles needing additional references (February 2013) |
| Aromatic transition state theory | Low | Stub | 2 | December 2008 | Orphaned articles (December 2008), Articles lacking sources (June 2009) |
| Aron Kuppermann | Low | Stub | 2 | January 2011 | Articles with topics of unclear notability (January 2011), Persondata templates without short description parameter |
| Arrhenius equation | Mid | Start | 1 | January 2013 | Articles with unsourced statements (January 2013) |
| Arrow pushing | Mid | Start | 1 | April 2009 | Articles needing additional references (April 2009) |
| Arsenic toxicity | Mid | C | 1 | November 2009 | Articles with unsourced statements (November 2009) |
| Arthur C. Cope | Mid | Stub | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Arthur Nowick | Low | C | 2 | July 2011 | Orphaned articles (July 2011), Articles needing more detailed references |
| Arthur Rudolf Hantzsch | Mid | Start | 1 | Persondata templates without short description parameter | |
| Arthur W. Thomas | Low | Stub | 1 | March 2010 | Articles with unsourced statements (March 2010) |
| Artificial gene synthesis | Low | C | 2 | May 2010 | Articles to be expanded (May 2010), Articles with unsourced statements (April 2013) |
| Artturi Ilmari Virtanen | High | Start | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| Asasantin | Low | Stub | 1 | June 2010 | Orphaned articles (June 2010) |
| Aspartate receptor | Low | Stub | 1 | March 2011 | Orphaned articles (March 2011) |
| Asphalt | Low | C | 2 | April 2011 | Articles with unsourced statements (April 2011, October 2011) |
| Assay | Mid | Start | 1 | May 2009 | Articles needing additional references (May 2009) |
| Asterane | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Astrochemistry | High | Start | 2 | January 2011 | Articles to be merged (July 2011), Articles with unsourced statements (January 2011) |
| Asymmetric catalytic oxidation | Mid | Stub | 1 | October 2007 | Articles lacking sources (October 2007) |
| Asymmetric catalytic reduction | Mid | Stub | 1 | October 2007 | Articles lacking sources (October 2007) |
| Asymmetric induction | Mid | Start | 1 | February 2013 | Articles with links needing disambiguation (February 2013) |
| Asymmetric nucleophilic epoxidation | Mid | C | 1 | October 2012 | Articles with too few wikilinks (October 2012) |
| AT-10 resin | Low | Stub | 1 | December 2006 | Articles lacking sources (December 2006) |
| Atmospheric methane | Low | C | 1 | November 2012 | Articles with unsourced statements (November 2012) |
| Atom | Top | FA | 3 | April 2011 | Wikipedia articles needing clarification (February 2013), Wikipedia articles needing page number citations (April 2011), Articles with unsourced statements (February 2013) |
| Atomic carbon | Mid | Start | 1 | September 2010 | Articles lacking in-text citations (September 2010) |
| Atomic orbital | Mid | B | 2 | November 2011 | Wikipedia articles needing clarification (November 2011), Articles with unsourced statements (January 2013) |
| Atomic ratio | Mid | Stub | 1 | April 2007 | Articles lacking sources (April 2007) |
| Atul Kumar | Low | Start | 2 | September 2010 | Articles with dead external links (September 2010), Persondata templates without short description parameter |
| August Freund | Low | Stub | 2 | November 2009 | Articles needing additional references (November 2009), Persondata templates without short description parameter |
| August Michaelis | Low | Stub | 1 | Persondata templates without short description parameter | |
| Autocatalysis | Low | Start | 2 | September 2010 | Articles to be merged (February 2013), Articles needing additional references (September 2010) |
| Autocatalytic reaction | High | Start | 1 | February 2013 | Articles to be merged (February 2013) |
| Automatic continuous online monitoring of polymerization reactions | Mid | Start | 3 | February 2012 | Wikipedia articles that are too technical (October 2012), Articles with unsourced statements (February 2012), All articles needing expert attention |
| Avermectin | Low | Start | 1 | January 2011 | Wikipedia articles needing factual verification (January 2011) |
| Avogadro's law | High | Start | 1 | March 2009 | Articles needing additional references (March 2009) |
| Axel C. Heitmann | Low | Stub | 1 | Persondata templates without short description parameter | |
| Axial ratio | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Azane | Low | Start | 2 | August 2012 | Articles lacking sources (August 2012), Articles with unsourced statements (April 2013) |
| Azepine | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Azole | Low | Start | 1 | November 2009 | Articles with unsourced statements (November 2009) |
| Émile Henriot (chemist) | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Étard reaction | Mid | Stub | 1 | May 2008 | Articles with dead external links (May 2008) |
| Étienne-Émile Baulieu | Low | C | 1 | Persondata templates without short description parameter | |
| Backbone chain | High | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Balalaikalate | Low | Stub | 3 | January 2011 | Articles with topics of unclear notability (January 2011), Orphaned articles (January 2011), Articles lacking sources (January 2011) |
| Ball-and-stick model | Mid | Start | 1 | April 2010 | Articles lacking sources (April 2010) |
| Ballotechnics | Low | Start | 1 | March 2011 | Articles with unsourced statements (March 2011) |
| Bancroft rule | Mid | Start | 3 | October 2009 | Wikipedia articles needing context (October 2009), Wikipedia introduction cleanup (October 2009), Articles lacking sources (December 2009) |
| Barfoed's test | Low | Stub | 1 | April 2009 | Articles with unsourced statements (April 2009) |
| Barton–Zard synthesis | Mid | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Base-promoted epoxide isomerization | Low | C | 2 | July 2011 | Orphaned articles (July 2011), Articles with too few wikilinks (November 2012) |
| Base (chemistry) | Top | Start | 1 | September 2010 | Articles needing additional references (September 2010) |
| Base modifying agent | Low | Stub | 2 | January 2010 | Orphaned articles (March 2010), Articles lacking sources (January 2010) |
| Basic aromatic ring | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Bassam Shakhashiri | Low | Stub | 1 | January 2010 | Articles lacking reliable references (January 2010) |
| Bates–Guggenheim Convention | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Battery (electricity) | Mid | C | 7 | October 2009 | Wikipedia articles needing copy edit (April 2013), Articles containing potentially dated statements (2012), Wikipedia introduction cleanup (August 2012), Articles needing additional references (January 2012), Articles lacking reliable references (October 2009), Wikipedia articles needing rewrite (April 2013), Articles with unsourced statements (December 2010) |
| Bauxite | Mid | C | 1 | August 2011 | Articles with unsourced statements (August 2011) |
| Bayberry wax | Low | Stub | 1 | March 2009 | Articles lacking sources (March 2009) |
| Becher process | Mid | Start | 1 | March 2008 | Articles with unsourced statements (March 2008) |
| Beetin | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Behavior of nuclear fuel during a reactor accident | Low | Stub | 1 | March 2011 | Articles with dead external links (March 2011) |
| Beilstein database | Low | Start | 1 | February 2013 | Articles lacking reliable references (February 2013) |
| Beilstein Registry Number | Low | Stub | 1 | June 2009 | Articles lacking sources (June 2009) |
| Bent metallocenes | Low | Start | 4 | November 2010 | Wikipedia pages needing cleanup (November 2010), Articles needing cleanup (November 2010), Orphaned articles (November 2010), All articles needing expert attention |
| Benzenediol | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Benzoyl | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Benzyl | Mid | C | 1 | July 2012 | Articles with dead external links (July 2012) |
| Bergenite | Mid | Start | 1 | December 2009 | Articles with unsourced statements (December 2009) |
| Bergius process | Mid | Start | 2 | September 2009 | Articles with dead external links (September 2009), Articles with unsourced statements (December 2010) |
| Bernard Mouat Jones | Low | Stub | 1 | Persondata templates without short description parameter | |
| Beta-Hydride elimination | Mid | C | 1 | August 2012 | Articles needing additional references (August 2012) |
| Beta-Ketoacyl ACP reductase | Low | Stub | 1 | September 2012 | Articles to be merged (September 2012) |
| Beta-lactam | Mid | C | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| Bicarbonate | High | Start | 1 | March 2011 | Articles with unsourced statements (March 2011) |
| Bicarbonate indicator | Low | Stub | 2 | August 2012 | Wikipedia articles needing clarification (August 2012), Articles lacking in-text citations (August 2012) |
| Bifluoride | Low | Start | 1 | April 2012 | Articles with unsourced statements (April 2012) |
| Biguanide | Low | Start | 2 | January 2011 | Articles needing cleanup (June 2012), Articles lacking in-text citations (January 2011) |
| Binary compounds of hydrogen | Mid | Start | 1 | August 2012 | Articles to be merged (August 2012) |
| Binary explosive | Low | Stub | 1 | May 2010 | Articles with dead external links (May 2010) |
| Binary liquid | Low | Stub | 1 | June 2008 | Articles lacking sources (June 2008) |
| Bin Chen | Low | Start | 1 | August 2012 | Orphaned articles (August 2012) |
| Bioactive paper | Low | Start | 3 | July 2009 | Wikipedia articles with possible conflicts of interest (July 2009), Articles lacking in-text citations (August 2009), Articles needing additional references (July 2009) |
| Biocatalysis | High | Start | 2 | January 2011 | Wikipedia articles needing page number citations (February 2013), Vague or ambiguous time (January 2011) |
| Biochemistry | High | B | 2 | June 2011 | Articles needing additional references (June 2011), Articles with unsourced statements (October 2011) |
| Biomonitoring | Mid | C | 1 | April 2012 | Wikipedia articles needing page number citations (April 2012) |
| Biophysical chemistry | Mid | Stub | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| Biotin sulfoxide | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Bipolaron | Low | Stub | 1 | March 2013 | Wikipedia introduction cleanup (March 2013) |
| Bismuthide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Bistriflimide | Low | Stub | 1 | May 2011 | Articles with unsourced statements (May 2011) |
| BKchem | Low | Stub | 1 | August 2011 | Articles lacking reliable references (August 2011) |
| Black liquor | Low | Start | 3 | June 2009 | Articles with dead external links (October 2010), Articles with unsourced statements (June 2009), Articles with specifically marked weasel-worded phrases (April 2013) |
| Blank (solution) | Low | Stub | 1 | All articles needing expert attention | |
| Bleaching of wood pulp | Mid | B | 1 | October 2010 | Articles with dead external links (October 2010) |
| Bloch equations | Low | C | 1 | February 2011 | Articles to be expanded (February 2011) |
| Block (periodic table) | Low | Start | 1 | July 2009 | Articles needing additional references (July 2009) |
| Bogumił Brzezinski | Low | Stub | 1 | February 2013 | BLP articles lacking sources (February 2013) |
| Bohuslav Brauner | Low | Start | 1 | October 2010 | Articles with dead external links (October 2010) |
| Bond cleavage | Low | Stub | 2 | March 2013 | Wikipedia pages needing cleanup (March 2013), Articles needing cleanup (March 2013) |
| Bond valence method | Low | Start | 1 | November 2011 | Wikipedia introduction cleanup (November 2011) |
| Borderline hydrides | Mid | C | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Bosch reaction | Mid | Stub | 1 | March 2008 | Articles with unsourced statements (March 2008) |
| Bound state | Low | Start | 2 | March 2011 | Accuracy disputes (March 2011), Articles needing additional references (February 2013) |
| Brass | Mid | C | 1 | October 2010 | Articles with unsourced statements (October 2010) |
| Bridgewire | Low | Stub | 1 | December 2011 | Articles with dead external links (December 2011) |
| Bromatometry | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Brominated flame retardant | High | Start | 2 | July 2007 | Articles to be expanded (January 2009), Articles with unsourced statements (July 2007) |
| Bromopentane | Low | Stub | 2 | November 2011 | Orphaned articles (December 2011), Articles lacking sources (November 2011) |
| Bronze | Mid | C | 3 | February 2008 | Articles with unsourced statements (December 2012, February 2008, May 2011) |
| Brooks Pate | Low | Stub | 1 | Persondata templates without short description parameter | |
| Bucherer–Bergs reaction | Mid | Stub | 1 | July 2011 | Articles with unsourced statements (July 2011) |
| Bunsen reaction | Low | Stub | 1 | October 2007 | Articles lacking sources (October 2007) |
| Buoyant density ultracentrifugation | Low | Stub | 1 | January 2012 | Articles lacking sources (January 2012) |
| Burkhard Rost | Low | Start | 1 | February 2013 | Articles with unsourced statements (February 2013) |
| Burning splint test | Low | Stub | 1 | January 2011 | Articles lacking sources (January 2011) |
| Burn rate (chemistry) | Low | Start | 1 | November 2012 | Articles needing additional references (November 2012) |
| Burst charge | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Butyl | Mid | Start | 2 | January 2011 | Articles to be merged (January 2013), Articles with unsourced statements (January 2011) |
| Butyrate | Low | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| C-mole | Low | Stub | 2 | January 2007 | Wikipedia articles needing clarification (September 2012), Articles lacking sources (January 2007) |
| CADPAC | Low | Stub | 1 | October 2008 | Orphaned articles (October 2008) |
| Cage effect (chemistry) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| CAG promoter | Low | Stub | 1 | April 2012 | Orphaned articles (April 2012) |
| Calciothermic reaction | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Calcium nitrite | Low | Stub | 1 | October 2012 | Articles needing additional references (October 2012) |
| Calcium phosphate | Low | Start | 3 | January 2010 | Articles needing additional references (January 2010), Articles with unsourced statements (January 2010, March 2013) |
| Calibration curve | Low | Start | 1 | October 2008 | Articles lacking in-text citations (October 2008) |
| Calorimetry | Mid | Start | 1 | October 2010 | Articles needing additional references (October 2010) |
| Camille Alphonse Faure | Low | Start | 1 | Persondata templates without short description parameter | |
| Cantharidic acid | Low | Stub | 1 | October 2012 | Orphaned articles (October 2012) |
| Can f 1 | Low | Stub | 1 | April 2012 | Orphaned articles (April 2012) |
| Capillary electrophoresis | Mid | B | 1 | November 2009 | Articles with unsourced statements (November 2009) |
| Capnomor | Low | Stub | 2 | December 2009 | Articles lacking sources (December 2009), Articles with unsourced statements (February 2010) |
| Capped square antiprismatic molecular geometry | Low | Stub | 1 | May 2012 | Articles lacking sources (May 2012) |
| Car–Parrinello method | Mid | Start | 1 | June 2012 | Articles to be merged (June 2012) |
| Carbamate | Mid | Start | 1 | April 2012 | Articles with unsourced statements (April 2012) |
| Carbido Complexes | Low | Start | 1 | All articles needing expert attention | |
| Carbocatalysis | Low | Start | 1 | July 2010 | Articles with unsourced statements (July 2010) |
| Carbodiimide | Mid | Start | 2 | December 2009 | Articles needing additional references (December 2009), Articles with unsourced statements (July 2012) |
| Carbohydrate chemistry | Mid | Stub | 2 | January 2009 | Articles lacking sources (January 2009), Articles with unsourced statements (May 2012) |
| Carbohydrate conformation | Low | C | 2 | January 2012 | Articles needing additional references (January 2012), All articles needing expert attention |
| Carbonyl Alpha-Substitution Reactions | Low | Start | 1 | October 2012 | Articles with links needing disambiguation (October 2012) |
| Carbonyl iron | Low | Start | 1 | December 2007 | Articles needing additional references (December 2007) |
| Carbonyl oxidation with hypervalent iodine reagents | Mid | C | 1 | September 2012 | Orphaned articles (September 2012) |
| Carbon in pulp | Low | C | 1 | December 2009 | Articles needing additional references (December 2009) |
| Carbon ring | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Carbon sequestration | Mid | C | 8 | January 2009 | Wikipedia articles needing clarification (September 2010), Articles with dead external links (May 2010, November 2012), Articles with unsourced statements (August 2009, January 2009, January 2011, June 2009, September 2010) |
| Carbotanium | Low | Stub | 1 | November 2010 | Articles needing additional references (November 2010) |
| Carboximidate | Mid | Stub | 1 | March 2011 | Articles lacking sources (March 2011) |
| Carboxylate ester | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Care 30 | Low | Stub | 2 | December 2008 | Orphaned articles (February 2009), Articles lacking sources (December 2008) |
| Carl Auer von Welsbach | Mid | Start | 3 | April 2012 | Articles needing additional references (April 2012), Vague or ambiguous time (April 2012), Persondata templates without short description parameter |
| Carl Bosch | High | C | 1 | Persondata templates without short description parameter | |
| Carl Duisberg | Low | Start | 1 | Persondata templates without short description parameter | |
| Carl Mannich | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Carl Reichenbach | Unknown | Unassessed | 2 | March 2009 | Articles with unsourced statements (March 2009, September 2010) |
| Carl Remigius Fresenius | Mid | Start | 1 | Persondata templates without short description parameter | |
| Carl Theodore Liebermann | Low | Start | 1 | Persondata templates without short description parameter | |
| Carl von Than | Low | Start | 1 | October 2010 | Articles with dead external links (October 2010) |
| Carolyn R. Bertozzi | Low | Start | 2 | October 2010 | BLP articles lacking sources (November 2012), Articles with unsourced statements (October 2010) |
| Cast iron | Mid | Start | 4 | October 2008 | Articles needing additional references (October 2008), Articles with unsourced statements (August 2010, March 2009, October 2008) |
| CAS registry number | Mid | Start | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| Catalysis | Top | C | 1 | September 2009 | Articles with unsourced statements (September 2009) |
| Catalysts and Catalysed Reactions | Low | Stub | 1 | July 2011 | Orphaned articles (July 2011) |
| Catalyst (museum) | Low | C | 2 | March 2008 | Articles with unsourced statements (July 2011, March 2008) |
| Catalyst poisoning | Low | Stub | 1 | September 2011 | Articles needing additional references (September 2011) |
| Catalytically competent protonation state | Low | Stub | 3 | June 2010 | Articles that may contain original research (June 2010), Articles lacking sources (June 2010), All articles needing expert attention |
| Catalytic cycle | Mid | Start | 1 | October 2007 | Articles with unsourced statements (October 2007) |
| Cathodic protection | Low | Start | 2 | December 2010 | Articles with unsourced statements (April 2013, December 2010) |
| Cathodic stripping voltammetry | Low | Stub | 1 | March 2011 | Articles lacking sources (March 2011) |
| CD36 antigen | Low | Stub | 1 | June 2011 | Orphaned articles (June 2011) |
| CDw17 antigen | Low | Stub | 2 | March 2009 | Wikipedia articles needing context (March 2009), Wikipedia introduction cleanup (March 2009) |
| Celloxylanase | Low | Stub | 3 | July 2012 | Articles needing cleanup (July 2012), Articles needing link rot cleanup (July 2012), Orphaned articles (October 2012) |
| Cellulase Unit | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Cement | Low | B | 1 | July 2012 | Articles needing additional references (July 2012) |
| Center for Computational Chemistry | Low | Stub | 1 | February 2009 | Articles lacking reliable references (February 2009) |
| Centrifugal evaporator | Low | Start | 1 | September 2007 | Articles needing additional references (September 2007) |
| Centrifugation | Mid | Start | 2 | November 2010 | Articles lacking in-text citations (November 2010), Articles with unsourced statements (December 2010) |
| Centrifuge | Mid | Start | 2 | January 2009 | Articles needing additional references (January 2009), Articles with unsourced statements (February 2012) |
| Centrosymmetry | Mid | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Ceramic chemistry | Low | Start | 4 | May 2010 | Articles with disputed statements (April 2012), Articles needing additional references (May 2010), Articles with unsourced statements (April 2012, June 2010) |
| Ceramic flux | Low | Start | 2 | April 2009 | Articles lacking in-text citations (April 2009), All articles needing expert attention |
| Cetrimonium | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Chain disproportionation | Mid | Stub | 1 | December 2010 | Orphaned articles (December 2010) |
| Chalcogenide | Low | Stub | 1 | December 2007 | Articles with unsourced statements (December 2007) |
| Chalcogenide glass | Low | Stub | 1 | February 2008 | Articles with unsourced statements (February 2008) |
| Chalcohalide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Characteristic property | Low | Stub | 1 | July 2010 | Orphaned articles (July 2010) |
| Charge-transfer complex | Mid | C | 2 | June 2010 | Articles with unsourced statements (June 2010, September 2011) |
| Charge contrast imaging | Low | Stub | 1 | August 2009 | Orphaned articles (August 2009) |
| Charge transfer coefficient | Low | Stub | 1 | October 2011 | Articles to be expanded (October 2011) |
| Charles A. Joy | Mid | Start | 2 | April 2013 | Articles lacking sources (April 2013), Persondata templates without short description parameter |
| Charles Anthony Goessmann | Low | Start | 1 | Persondata templates without short description parameter | |
| Charles Avery Doremus | Low | Start | 2 | April 2013 | Articles lacking sources (April 2013), Persondata templates without short description parameter |
| Charles Baskerville | Low | Start | 1 | Persondata templates without short description parameter | |
| Charles E. Wicks | Unknown | Unassessed | 2 | July 2010 | Articles with topics of unclear notability (July 2010), Articles needing additional references (July 2010) |
| Charles Frederick Burgess | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Charles Herty | Low | B | 1 | October 2010 | Articles with dead external links (October 2010) |
| Charles Kemball | Low | Stub | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Charles Robert Sanger | Low | C | 1 | July 2011 | Articles with dead external links (July 2011) |
| Charles Sanders Peirce | Low | B | 1 | March 2013 | Articles with specifically marked weasel-worded phrases (March 2013) |
| Charles Upham Shepard | Low | Start | 2 | December 2012 | Orphaned articles (December 2012), Articles lacking sources (April 2013) |
| Charring | Low | Start | 1 | October 2009 | Articles lacking sources (October 2009) |
| Chemical Abstracts Service | High | Start | 1 | May 2012 | Articles with a promotional tone (May 2012) |
| Chemical biology | Low | C | 3 | November 2011 | Wikipedia articles needing clarification (November 2011), Articles with unsourced statements (November 2011), Articles with specifically marked weasel-worded phrases (November 2011) |
| Chemical change | Mid | Start | 1 | January 2010 | Articles needing additional references (January 2010) |
| Chemical Communications | Low | Start | 1 | May 2012 | Articles lacking sources (May 2012) |
| Chemical decomposition | Mid | Start | 1 | March 2009 | Articles with unsourced statements (March 2009) |
| Chemical dehalogenation | Mid | Stub | 1 | April 2011 | Articles to be merged (April 2011) |
| Chemical element | Top | C | 2 | June 2011 | Articles with unsourced statements (February 2012, June 2011) |
| Chemical engineering | Mid | B | 3 | December 2011 | Articles with unsourced statements (December 2011, March 2013), Articles with specifically marked weasel-worded phrases (December 2011) |
| Chemical equation | High | C | 1 | September 2011 | Articles needing additional references (September 2011) |
| Chemical equilibrium | High | C | 3 | March 2009 | Wikipedia external links cleanup (August 2010), Articles needing additional references (March 2009), Wikipedia spam cleanup (August 2010) |
| Chemical file format | Mid | Start | 3 | August 2010 | Wikipedia external links cleanup (August 2010), Wikipedia spam cleanup (August 2010), Articles with unsourced statements (October 2010) |
| Chemical formula | High | Start | 1 | November 2012 | Wikipedia articles needing clarification (November 2012) |
| Chemical garden | Mid | Start | 1 | April 2011 | Articles with unsourced statements (April 2011) |
| Chemical industry | Mid | Start | 5 | June 2008 | Articles needing additional references (June 2008), Articles with unsourced statements (June 2008, May 2010, September 2012), Articles with specifically marked weasel-worded phrases (November 2010) |
| Chemical kinetics | High | B | 2 | September 2012 | Articles lacking in-text citations (September 2012), Articles needing additional references (September 2012) |
| Chemical law | High | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Chemical physics | High | Start | 2 | December 2009 | Articles lacking sources (December 2009), Articles with links needing disambiguation (January 2012) |
| Chemical polarity | High | C | 1 | December 2011 | Articles needing additional references (December 2011) |
| Chemical potential | Mid | C | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Chemical property | Mid | Stub | 2 | December 2009 | Wikipedia articles needing clarification (August 2012), Articles needing additional references (December 2009) |
| Chemical Research Center of the Hungarian Academy of Sciences | Low | Start | 1 | June 2009 | Orphaned articles (June 2009) |
| Chemical safety assessment | Low | Stub | 1 | January 2010 | Articles needing additional references (January 2010) |
| Chemical state | Mid | Start | 2 | December 2007 | Wikipedia articles needing style editing (December 2007), All articles needing expert attention |
| Chemical symbol | Low | Start | 1 | February 2013 | Articles to be merged (February 2013) |
| Chemical table file | Mid | Start | 2 | June 2010 | Wikipedia articles needing clarification (June 2010), Wikipedia articles in need of updating (June 2010) |
| Chemical terrorism | Mid | Start | 1 | January 2010 | Articles with unsourced statements (January 2010) |
| Chemical test | Mid | List | 1 | June 2012 | Articles lacking sources (June 2012) |
| Chemical transformation | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Chemical Vapor Deposition (journal) | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Chemical warfare | Mid | C | 11 | February 2008 | Articles with dead external links (June 2010), Articles needing additional references (November 2010), Articles with unsourced statements (April 2010, August 2010, December 2010, February 2008, January 2013, November 2010, October 2009, October 2010), Articles with specifically marked weasel-worded phrases (November 2010) |
| Chemical waste | Top | Start | 2 | November 2007 | Articles with unsourced statements (November 2007), Articles with limited geographic scope (May 2012) |
| Chemical weapon | Mid | Start | 3 | July 2012 | Wikipedia introduction cleanup (August 2012), Articles with unsourced statements (July 2012), Articles with limited geographic scope (December 2012) |
| Chemistry | Top | B | 6 | June 2010 | Articles with dead external links (June 2011, November 2010), Articles lacking reliable references (July 2010), Articles with unsourced statements (June 2010, September 2010), Wikipedia articles needing factual verification (September 2010) |
| Chemistry education | Mid | Start | 1 | February 2012 | Articles to be merged (February 2012) |
| Chemistry of Photolithography | Low | C | 1 | March 2013 | Orphaned articles (March 2013) |
| Chemistry set | Mid | Start | 1 | November 2012 | Articles with links needing disambiguation (November 2012) |
| Chemtool | Low | Stub | 2 | August 2011 | Articles with topics of unclear notability (August 2011), Articles lacking reliable references (August 2011) |
| Chemurgy | Unknown | Start | 1 | September 2008 | Articles to be expanded (September 2008) |
| ChemXSeer | Low | Start | 1 | November 2011 | Articles needing additional references (November 2011) |
| Chicken wire (chemistry) | Low | Start | 1 | November 2007 | Articles with unsourced statements (November 2007) |
| Chinese Chemistry Olympiad | Low | Stub | 1 | September 2012 | Orphaned articles (September 2012) |
| Chiral column chromatography | Low | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| ChiRP-Seq | Low | Stub | 4 | November 2011 | Wikipedia articles needing context (November 2011), Wikipedia introduction cleanup (November 2011), Articles needing additional references (November 2011), Articles with too few wikilinks (November 2012) |
| Chloralkali process | High | C | 1 | March 2011 | Articles lacking in-text citations (March 2011) |
| Chloramination | Low | Start | 1 | August 2012 | Articles needing additional references (August 2012) |
| Chlorate | High | Start | 1 | December 2007 | Articles with unsourced statements (December 2007) |
| Chloride | High | Start | 2 | April 2009 | Articles needing additional references (April 2009), Articles with unsourced statements (March 2012) |
| Chlorine production | Mid | C | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Chlorinity | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Chlorofluorocarbon | High | B | 2 | April 2010 | Articles with disputed statements (April 2010), Articles with unsourced statements (March 2011) |
| Chlorographene | Low | Stub | 2 | November 2012 | Wikipedia articles needing context (November 2012), Wikipedia introduction cleanup (November 2012) |
| Chlorotoluene | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Cholesteric liquid crystal | Low | Stub | 1 | June 2009 | Articles with unsourced statements (June 2009) |
| Chondronectin | Low | Stub | 1 | October 2010 | Orphaned articles (October 2010) |
| Christian Heinrich Pfaff | Low | Start | 1 | Persondata templates without short description parameter | |
| Christian Møller | Low | Stub | 1 | Persondata templates without short description parameter | |
| Christie G. Enke | Low | Stub | 1 | Persondata templates without short description parameter | |
| Christina Cruickshank Miller | Unknown | Stub | 2 | October 2012 | Articles lacking sources (November 2012), Articles with too few wikilinks (October 2012) |
| Christopher M. Reddy | Low | Start | 2 | September 2012 | Articles lacking in-text citations (March 2013), Articles lacking reliable references (September 2012) |
| Christopher Spencer Foote | Low | Start | 1 | December 2010 | Articles to be expanded (December 2010) |
| Chris Dobson | Low | Stub | 3 | August 2012 | BLP articles lacking sources (August 2012), Articles lacking reliable references (August 2012), Persondata templates without short description parameter |
| Chromate conversion coating | Mid | Start | 2 | October 2009 | Articles with unsourced statements (October 2009, September 2010) |
| Chromatographic response function | Low | Stub | 2 | September 2008 | Articles lacking in-text citations (September 2008), Articles with unsourced statements (September 2009) |
| Chromatography | High | B | 1 | September 2008 | Articles to be expanded (September 2008) |
| Chromatography in blood processing | Low | C | 4 | September 2008 | Articles lacking in-text citations (April 2009, September 2008), Wikipedia introduction cleanup (April 2013), Articles that may contain original research (September 2008) |
| Chrome plating | Mid | C | 1 | November 2012 | Wikipedia articles needing style editing (November 2012) |
| Chromoprotein | Low | Stub | 1 | March 2012 | Articles lacking sources (March 2012) |
| Chronic toxicity | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Cis–trans isomerism | High | Start | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Clark cell | Low | Start | 1 | December 2012 | Articles with unsourced statements (December 2012) |
| Classical element | Mid | C | 4 | August 2007 | Articles needing additional references (August 2007, May 2009, September 2007), Articles with unsourced statements (January 2008) |
| Class III β-tubulin | Low | Stub | 1 | February 2008 | Articles lacking sources (February 2008) |
| Claude Louis Berthollet | High | Start | 2 | January 2013 | Articles needing additional references (January 2013), Persondata templates without short description parameter |
| Clerodane diterpene | Low | Stub | 4 | October 2011 | Wikipedia pages needing cleanup (October 2011), Articles needing cleanup (October 2011), Wikipedia articles that are too technical (October 2011), All articles needing expert attention |
| Click chemistry | Low | C | 2 | May 2012 | Wikipedia articles needing clarification (May 2012), Articles with unsourced statements (May 2012) |
| Clinical Quality Management System | Low | Stub | 3 | March 2008 | Articles lacking sources (March 2008), Wikipedia articles needing style editing (July 2008), Articles with too few wikilinks (December 2012) |
| Clinton Ballou | Low | Stub | 1 | Persondata templates without short description parameter | |
| Cloud point | Low | Stub | 2 | January 2010 | Articles with dead external links (January 2010), Articles needing additional references (February 2010) |
| Coal gas | Low | C | 2 | October 2007 | Articles to be expanded (October 2007), Articles needing additional references (June 2009) |
| Coating | Low | Start | 4 | April 2010 | Articles needing cleanup (April 2010), Articles lacking in-text citations (April 2010), Articles with sections that need to be turned into prose (April 2010), Articles needing additional references (April 2010) |
| Cobalt(II) thiocyanate | Low | C | 1 | August 2010 | Articles with unsourced statements (August 2010) |
| Cobalt-mediated radical polymerization | Low | Start | 1 | All articles needing expert attention | |
| Cocrystal | Low | C | 2 | September 2012 | Wikipedia articles that are too technical (September 2012), All articles needing expert attention |
| Cohesion (chemistry) | Mid | Start | 2 | March 2010 | Articles to be merged (December 2011), Articles needing additional references (March 2010) |
| Coil (chemistry) | Low | Stub | 2 | December 2009 | Orphaned articles (December 2009), Articles lacking sources (December 2009) |
| Cold finger | Mid | Start | 1 | October 2010 | Articles lacking sources (October 2010) |
| Colin Eaborn | Low | Start | 1 | Persondata templates without short description parameter | |
| Colin Vincent | Low | Stub | 1 | June 2010 | BLP articles lacking sources (June 2010) |
| College of Chemical Sciences | Low | Stub | 4 | June 2011 | Wikipedia articles with possible conflicts of interest (June 2011), Articles needing additional references (June 2011), Articles with too few wikilinks (November 2012), All articles needing coordinates |
| Collision theory | Mid | B | 1 | February 2010 | Articles with unsourced statements (February 2010) |
| Colloid | High | B | 2 | July 2009 | Wikipedia articles needing clarification (June 2012), Articles with unsourced statements (July 2009) |
| Colloid-facilitated transport | Low | Stub | 1 | May 2010 | Articles with dead external links (May 2010) |
| Colloidal gold | Mid | C | 1 | May 2009 | Articles with unsourced statements (May 2009) |
| Collybistin | Low | Stub | 1 | December 2011 | Articles with links needing disambiguation (December 2011) |
| Colored gold | Mid | C | 2 | May 2011 | Articles with unsourced statements (May 2011), Articles with specifically marked weasel-worded phrases (April 2013) |
| Colorimeter (chemistry) | Mid | Start | 1 | May 2010 | Articles needing additional references (May 2010) |
| Color of chemicals | Mid | Start | 2 | January 2008 | Articles that may contain original research (November 2010), Articles needing additional references (January 2008) |
| Column chromatography | Low | Start | 1 | February 2011 | Articles to be expanded (February 2011) |
| Combination reaction | Low | Stub | 1 | April 2009 | Articles lacking sources (April 2009) |
| Combinatorial chemistry | Top | Start | 1 | November 2012 | Articles with unsourced statements (November 2012) |
| Combustion | High | C | 1 | April 2013 | Wikipedia introduction cleanup (April 2013) |
| Combustion analysis | Mid | C | 1 | February 2012 | Articles with links needing disambiguation (February 2012) |
| Comet (pyrotechnics) | Low | Stub | 2 | November 2012 | Articles lacking in-text citations (November 2012), Articles needing additional references (November 2012) |
| Commodity chemicals | Low | Stub | 3 | September 2010 | Articles to be merged (September 2010), Articles needing additional references (September 2010), All articles needing expert attention |
| Compartment (chemistry) | Low | Stub | 1 | August 2008 | Articles lacking sources (August 2008) |
| Complex metallic alloys | Low | Stub | 1 | All articles needing expert attention | |
| Concurrent tandem catalysis | Low | Stub | 3 | May 2009 | Wikipedia pages needing cleanup (May 2009), Articles needing cleanup (May 2009), Orphaned articles (January 2010) |
| Condensation polymer | Low | Start | 1 | July 2008 | Articles lacking sources (July 2008) |
| Condenser (laboratory) | High | B | 1 | February 2011 | Articles with unsourced statements (February 2011) |
| Conditioner (chemistry) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Condosity | Low | Stub | 2 | July 2007 | Orphaned articles (February 2009), Articles lacking sources (July 2007) |
| Conductive Characteristics within Coated Synthetic Fabrics | Low | Stub | 3 | October 2010 | Articles with topics of unclear notability (December 2011), Orphaned articles (October 2010), Articles needing additional references (December 2011) |
| Conductometry | Low | Stub | 1 | January 2010 | Articles needing additional references (January 2010) |
| Cone calorimeter | Low | Stub | 2 | April 2013 | Wikipedia pages needing cleanup (April 2013), Articles needing cleanup (April 2013) |
| Conical measure | Low | Stub | 2 | December 2009 | Articles needing additional references (December 2009), Articles with unsourced statements (September 2011) |
| Conjugate acid | Mid | Stub | 1 | March 2011 | Articles to be merged (March 2011) |
| Conrad Laar | Low | Stub | 1 | Persondata templates without short description parameter | |
| Convallamarin | Low | Stub | 1 | July 2010 | Articles to be expanded (July 2010) |
| Cook–Heilbron thiazole synthesis | Mid | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Coordination isomerism | Low | Stub | 1 | September 2008 | Orphaned articles (September 2008) |
| Cope rearrangement | Mid | C | 1 | January 2013 | Articles with unsourced statements (January 2013) |
| Copper-copper(II) sulfate electrode | Low | Stub | 1 | February 2012 | Articles with unsourced statements (February 2012) |
| Copper–chlorine cycle | Low | Stub | 1 | April 2012 | Articles with unsourced statements (April 2012) |
| Copper coulometer | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Corey–Itsuno reduction | Mid | C | 2 | January 2011 | Wikipedia pages needing cleanup (January 2011), Articles needing cleanup (January 2011) |
| Core charge | Low | Stub | 1 | September 2011 | Articles needing additional references (September 2011) |
| Corrosion | Mid | B | 2 | May 2010 | Articles with unsourced statements (July 2012, May 2010) |
| Countercurrent chromatography | Unknown | Unassessed | 3 | September 2008 | Articles needing additional references (September 2008), Wikipedia articles needing style editing (September 2008), All articles needing expert attention |
| Craig L. Hill | Low | Start | 1 | Persondata templates without short description parameter | |
| Creatine phosphate shuttle | Low | Stub | 1 | October 2011 | Articles lacking sources (October 2011) |
| Creep in composite materials | Low | Stub | 5 | November 2009 | Wikipedia introduction cleanup (November 2009), Orphaned articles (September 2010), Wikipedia articles that are too technical (November 2009), Articles with too few wikilinks (October 2012), All articles needing expert attention |
| Creosote | Low | B | 1 | May 2010 | Articles with unsourced statements (May 2010) |
| Crisscross method | Low | Stub | 1 | March 2011 | Articles needing additional references (March 2011) |
| Critical Reviews in Clinical Laboratory Sciences | Low | Start | 1 | July 2009 | Orphaned articles (July 2009) |
| Cross-reactivity | Low | Start | 1 | August 2011 | Articles needing additional references (August 2011) |
| Cryochemistry | Low | Stub | 2 | April 2013 | Articles needing additional references (April 2013), Wikipedia articles needing reorganization (April 2013) |
| Crystal | High | Start | 2 | January 2012 | Articles needing additional references (January 2012), Articles with unsourced statements (April 2012) |
| Crystallography | High | C | 2 | November 2009 | Articles lacking in-text citations (November 2009), Articles with unsourced statements (November 2012) |
| Crystal (software) | Low | Stub | 3 | January 2009 | Wikipedia pages needing cleanup (January 2009), Articles needing cleanup (January 2009), Wikipedia articles needing rewrite (January 2009) |
| Crystal field excitation | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| CrystEngComm | Low | Start | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| CSA (database company) | Low | Start | 1 | July 2012 | Articles with links needing disambiguation (July 2012) |
| Cu-Pt type ordering in III-V semiconductor | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Curtin–Hammett principle | Mid | C | 1 | October 2011 | Wikipedia articles needing clarification (October 2011) |
| Curt Wittig | Low | Start | 5 | June 2010 | BLP articles lacking sources (May 2011), Wikipedia pages needing cleanup (May 2011), Articles needing cleanup (May 2011), Wikipedia articles with possible conflicts of interest (May 2011), Orphaned articles (June 2010) |
| CuSil | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Cuvette | Low | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Cyanation | Mid | Stub | 2 | August 2008 | Articles to be merged (March 2011), Articles lacking sources (August 2008) |
| Cyanide | High | B | 5 | June 2008 | Articles with unsourced statements (April 2012, July 2012, June 2008, October 2008), Articles with links needing disambiguation (December 2011) |
| Cyanoacrylate | Mid | C | 2 | April 2012 | Articles with dead external links (December 2012), Wikipedia introduction cleanup (April 2012) |
| Cyanogen halide | Low | Stub | 1 | September 2012 | Articles needing additional references (September 2012) |
| Cycloalkene | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Cyclodextrin | Mid | Start | 1 | April 2013 | Wikipedia articles needing page number citations (April 2013) |
| Cyclohexane conformation | Mid | C | 2 | January 2008 | Articles with unsourced statements (August 2011, January 2008) |
| Cyclooctatetraenide anion | Low | Stub | 1 | March 2013 | Articles lacking sources (March 2013) |
| Cyril Norman Hinshelwood | High | Start | 2 | February 2013 | Articles needing additional references (February 2013), Persondata templates without short description parameter |
| Cyril Norman Hugh Long | Low | Stub | 1 | Persondata templates without short description parameter | |
| Cyril Y. Bowers | Low | Stub | 4 | April 2010 | Wikipedia pages needing cleanup (March 2011), Articles needing cleanup (March 2011), Orphaned articles (April 2010), Persondata templates without short description parameter |
| Cystathionine-γ-synthase | Low | Stub | 1 | June 2007 | Articles needing additional references (June 2007) |
| Cytoarchitecture | Low | Stub | 1 | June 2010 | Articles lacking sources (June 2010) |
| Cytochrome P450 | Mid | B | 2 | January 2010 | Articles with unsourced statements (April 2011, January 2010) |
| Dale L. Boger | Low | Start | 1 | Persondata templates without short description parameter | |
| Dalton Transactions | Low | C | 1 | March 2013 | Articles with dead external links (March 2013) |
| Dangerous Substances Directive (67/548/EEC) | Low | Start | 1 | January 2007 | Articles to be expanded (January 2007) |
| Daniel Rutherford | Mid | Start | 1 | Persondata templates without short description parameter | |
| Dan Shechtman | High | C | 2 | October 2011 | Articles with unsourced statements (October 2011), Vague or ambiguous time (October 2011) |
| Dark current (chemistry) | Low | Stub | 2 | November 2008 | Orphaned articles (February 2009), Articles lacking sources (November 2008) |
| David Milstein | Low | Start | 1 | Persondata templates without short description parameter | |
| David R. Bryant | Low | Start | 2 | October 2010 | Articles with dead external links (October 2010), Persondata templates without short description parameter |
| David S. Cafiso | Low | Start | 2 | August 2009 | BLP articles lacking sources (August 2009), Persondata templates without short description parameter |
| David Sulzer | Low | Stub | 3 | May 2011 | BLP articles lacking sources (May 2011), Wikipedia articles with possible conflicts of interest (May 2011), Articles lacking reliable references (May 2011) |
| Deactivating groups | Mid | Start | 1 | February 2011 | Articles to be merged (February 2011) |
| Deamination | Mid | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Debye–Hückel equation | Mid | B | 1 | Articles containing potentially dated statements (2007) | |
| Decarboxylative cross-coupling | Low | C | 1 | February 2013 | Orphaned articles (February 2013) |
| DECHEMA model | Low | Stub | 1 | November 2007 | Articles lacking sources (November 2007) |
| Dechlorinator | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Defoliant | Unknown | Stub | 1 | April 2007 | Articles needing additional references (April 2007) |
| Dennis A. Dougherty | Low | Stub | 1 | Persondata templates without short description parameter | |
| Densitation | Low | Stub | 2 | December 2009 | Articles lacking sources (December 2009), All articles needing expert attention |
| Depleted uranium | Low | B | 6 | July 2008 | Articles with dead external links (January 2012), NPOV disputes (February 2010), Articles with unsourced statements (August 2010, December 2012, July 2008, November 2011) |
| Depolarizer | Low | Start | 2 | October 2008 | Articles lacking in-text citations (October 2008), Articles with unsourced statements (February 2011) |
| Deposition (chemistry) | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Deprotonation | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Depside | Low | Stub | 1 | May 2010 | Articles with dead external links (May 2010) |
| Derek Barton | High | Start | 1 | Persondata templates without short description parameter | |
| Derek Long | Low | Start | 1 | Persondata templates without short description parameter | |
| Derek Lowe (chemist) | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Derivatization | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Desiccation | Unknown | Unassessed | 1 | October 2009 | Articles needing additional references (October 2009) |
| Desulfurisation | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Deuterium NMR | Mid | Stub | 1 | January 2010 | Articles with unsourced statements (January 2010) |
| Deville process | Unknown | Unassessed | 1 | August 2012 | Articles needing additional references (August 2012) |
| Diabatic | Low | C | 2 | January 2011 | Wikipedia articles needing clarification (January 2011), Wikipedia articles needing style editing (April 2013) |
| Diagonal relationship | Unknown | Stub | 1 | February 2007 | Articles needing additional references (February 2007) |
| Dialdehyde starch | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Diastereomeric recrystallization | Low | Stub | 1 | March 2010 | Articles lacking sources (March 2010) |
| Diauxic growth | Low | Stub | 1 | June 2011 | Articles lacking sources (June 2011) |
| Diazepine | Low | Disambig | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Diazine | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Diazonium compound | Mid | C | 1 | February 2012 | Articles with unsourced statements (February 2012) |
| Diesel fuel | Mid | Start | 5 | December 2007 | Wikipedia articles needing clarification (November 2012), Articles with dead external links (October 2011), Articles with unsourced statements (December 2007, March 2011, October 2011) |
| Dieter Enders | Low | Stub | 1 | Persondata templates without short description parameter | |
| Diethylaminoethyl cellulose | Low | Stub | 1 | December 2011 | Articles lacking sources (December 2011) |
| Differential pulse voltammetry | Low | C | 3 | October 2008 | Articles lacking in-text citations (October 2008), Articles needing additional references (March 2011, October 2008) |
| Diffraction standard | Low | Stub | 1 | November 2010 | Articles lacking sources (November 2010) |
| Diffusion-controlled reaction | Mid | Start | 1 | July 2012 | Articles that may contain original research (July 2012) |
| Digoxin | Low | B | 1 | April 2012 | Articles needing additional references (April 2012) |
| Dihydroalprenolol | Low | Stub | 2 | March 2009 | Wikipedia articles needing context (March 2009), Wikipedia introduction cleanup (March 2009) |
| DiI | Low | Stub | 1 | December 2010 | Articles needing additional references (December 2010) |
| Diisopropylammonium bromide | Low | Stub | 1 | January 2013 | Orphaned articles (January 2013) |
| Dimer (chemistry) | Mid | Start | 1 | April 2009 | Articles needing additional references (April 2009) |
| Dimer acid | Low | Stub | 1 | November 2011 | Articles with dead external links (November 2011) |
| Dimethyl tetrachloroterephthalate | Unknown | Stub | 1 | June 2011 | Articles lacking reliable references (June 2011) |
| Dioxygen in biological reactions | Mid | B | 1 | September 2011 | Wikipedia articles needing factual verification (September 2011) |
| Dirac (software) | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Discharge ionization detector | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Discotic liquid crystal | Low | Stub | 2 | August 2009 | Wikipedia articles needing context (August 2009), Wikipedia introduction cleanup (August 2009) |
| Discovery and development of nucleoside and nucleotide reverse-transcriptase inhibitors | High | C | 1 | June 2011 | Articles with links needing disambiguation (June 2011) |
| Dishwasher salt | Low | Start | 1 | September 2012 | Articles needing additional references (September 2012) |
| Disk-covering method | Low | Stub | 2 | February 2008 | Articles lacking in-text citations (February 2008), Orphaned articles (February 2009) |
| Dispersion (chemistry) | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Dissociation (chemistry) | High | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Dissolution (chemistry) | High | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Dissolved organic carbon | Mid | Start | 1 | October 2009 | Articles needing additional references (October 2009) |
| Distillation | High | B | 3 | May 2009 | Wikipedia articles needing clarification (May 2009), Articles with unsourced statements (March 2011, May 2009) |
| Disulfide bond | Mid | B | 2 | May 2010 | Articles needing additional references (May 2010), Articles with unsourced statements (November 2012) |
| Dithiane | Mid | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Dithiocarbamate | Low | Stub | 1 | November 2006 | Articles lacking sources (November 2006) |
| Dmitri Mendeleev | Top | C | 3 | March 2011 | Articles needing additional references (March 2011), Articles with specifically marked weasel-worded phrases (July 2011), Persondata templates without short description parameter |
| Donald J. Darensbourg | Low | Start | 1 | Persondata templates without short description parameter | |
| Doré bullion | Low | Stub | 1 | June 2007 | Articles lacking sources (June 2007) |
| Dorothee Kern | Low | Stub | 1 | Persondata templates without short description parameter | |
| Dorothy Hodgkin | Low | Start | 2 | March 2010 | Articles with unsourced statements (March 2010, October 2011) |
| Douglas H. Turner | Unknown | Unassessed | 2 | October 2010 | BLP articles lacking sources (March 2011), Articles to be expanded (October 2010) |
| Dow process | Low | Stub | 1 | February 2012 | Articles with unsourced statements (February 2012) |
| Dragon's egg | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Drins | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Drisapersen | Low | Stub | 1 | March 2013 | Articles with dead external links (March 2013) |
| Dropping funnel | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Druglikeness | Low | Stub | 2 | January 2013 | Wikipedia articles needing clarification (January 2013), Articles with unsourced statements (January 2013) |
| Drugwipe test | Low | Start | 1 | July 2009 | Orphaned articles (July 2009) |
| Dry basis | Low | Stub | 1 | June 2011 | Articles lacking sources (June 2011) |
| Dry ice | Mid | B | 2 | July 2009 | Articles with dead external links (July 2009), Articles with unsourced statements (July 2009) |
| Dry media reaction | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Dudley R. Herschbach | Mid | Start | 1 | Persondata templates without short description parameter | |
| Dutch metal | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Dyall Hamiltonian | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Dyeing | Unknown | Unassessed | 3 | June 2008 | Wikipedia pages needing cleanup (January 2011), Articles needing cleanup (January 2011), Articles to be expanded (June 2008) |
| Dynamic vapor sorption | Low | Start | 1 | January 2011 | Orphaned articles (January 2011) |
| Earl Muetterties | Low | Start | 1 | Persondata templates without short description parameter | |
| Earth (chemistry) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Ebullioscope | Low | Start | 1 | February 2008 | Articles with unsourced statements (February 2008) |
| Ectoplasmic specialisation | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Edgar Fahs Smith | Low | Start | 1 | March 2013 | Articles needing additional references (March 2013) |
| Edmond Frémy | Mid | Start | 1 | May 2010 | Articles with dead external links (May 2010) |
| Edmund Davy | Low | Start | 1 | Persondata templates without short description parameter | |
| Edmund ter Meer | Low | Stub | 1 | Persondata templates without short description parameter | |
| Eduard Buchner | High | Start | 1 | June 2010 | Articles with dead external links (June 2010) |
| Education in Chemistry | Low | Stub | 1 | March 2009 | Articles lacking sources (March 2009) |
| Edvard Hjelt | Low | C | 1 | Persondata templates without short description parameter | |
| Edward A. Guggenheim | Low | Start | 1 | Persondata templates without short description parameter | |
| Edward M. Burgess | Low | Stub | 1 | Persondata templates without short description parameter | |
| Edward Weston (chemist) | Mid | C | 1 | October 2011 | Articles lacking in-text citations (October 2011) |
| Edwin McMillan | High | Start | 2 | March 2013 | Articles needing additional references (March 2013), Persondata templates without short description parameter |
| EFSH | Low | Stub | 1 | January 2008 | Articles lacking sources (January 2008) |
| Ehud Gazit | Low | Start | 1 | Persondata templates without short description parameter | |
| Ei-ichi Negishi | High | Stub | 1 | Persondata templates without short description parameter | |
| EIF4C | Low | Stub | 2 | January 2009 | Orphaned articles (February 2009), Articles lacking sources (January 2009) |
| Eiji Osawa | Low | Stub | 1 | Persondata templates without short description parameter | |
| Ejection charge | Low | Stub | 1 | January 2009 | Articles lacking sources (January 2009) |
| Elaunin | Low | Stub | 2 | October 2009 | Wikipedia articles needing clarification (October 2009), Articles lacking sources (October 2009) |
| Electrical conductivity meter | Low | Start | 2 | September 2011 | Articles lacking sources (September 2011), Articles with unsourced statements (September 2011) |
| Electride | Mid | Stub | 1 | March 2012 | Articles to be merged (March 2012) |
| Electrochemical cell | High | Start | 1 | August 2012 | Articles lacking sources (August 2012) |
| Electrochemical gradient | Low | Start | 2 | October 2011 | Wikipedia articles that are too technical (October 2011), All articles needing expert attention |
| Electrochemical window | Low | Stub | 1 | April 2013 | Articles lacking in-text citations (April 2013) |
| Electrode | Low | Start | 1 | January 2010 | Articles needing additional references (January 2010) |
| Electrodeionization | Low | C | 1 | December 2007 | Articles lacking reliable references (December 2007) |
| Electrogravimetry | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Electrolytic cell | Low | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Electromeric effect | Unknown | Unassessed | 3 | August 2009 | Orphaned articles (September 2010), Articles lacking sources (August 2009), Articles with too few wikilinks (October 2012) |
| Electrometallurgy | Unknown | Stub | 1 | July 2012 | Articles needing additional references (July 2012) |
| Electron affinity | Mid | Start | 2 | March 2013 | Wikipedia articles needing page number citations (March 2013), Wikipedia articles needing factual verification (March 2013) |
| Electron counting | Top | B | 1 | April 2010 | Articles needing cleanup (April 2010) |
| Electron deficiency | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Electron density | Mid | Start | 1 | September 2010 | Articles to be merged (September 2010) |
| Electron paramagnetic resonance | Mid | C | 1 | June 2010 | Wikipedia articles needing clarification (June 2010) |
| Electrophilic fluorination | Unknown | Unassessed | 2 | October 2010 | Wikipedia pages needing cleanup (October 2010), Articles needing cleanup (October 2010) |
| Electrorheological fluid | Low | Start | 1 | April 2010 | Wikipedia articles needing clarification (April 2010) |
| Element-reactant-product table | Unknown | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Elemental analysis | High | Start | 2 | December 2011 | Articles needing additional references (December 2011), Articles with unsourced statements (December 2011) |
| EleMints | Low | Start | 1 | August 2010 | Orphaned articles (August 2010) |
| Eleutheroside | Unknown | Unassessed | 1 | February 2012 | Articles lacking sources (February 2012) |
| Elias James Corey | High | C | 1 | Persondata templates without short description parameter | |
| Eli Ruckenstein | Low | Stub | 1 | Persondata templates without short description parameter | |
| Ellen Gleditsch | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Ellen Swallow Richards | Low | C | 2 | June 2011 | Articles with unsourced statements (June 2011), Persondata templates without short description parameter |
| Eloy Rodriguez | Low | Stub | 1 | Persondata templates without short description parameter | |
| Endcapping | Low | Stub | 1 | December 2008 | Articles lacking sources (December 2008) |
| Endohedral fullerene | Low | B | 1 | August 2012 | Articles with links needing disambiguation (August 2012) |
| Energy harvesting | Low | C | 2 | February 2011 | Self-contradictory articles (September 2011), Wikipedia articles needing factual verification (February 2011) |
| Energy level | High | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Energy value of coal | Low | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Ene reaction | Mid | C | 1 | November 2011 | Wikipedia articles needing clarification (November 2011) |
| Enhancement or quenching of QD, Q-wire and QW radiations | Low | Start | 2 | July 2009 | Orphaned articles (July 2009), All articles needing expert attention |
| Enniatin | Unknown | Unassessed | 1 | June 2011 | Articles with unsourced statements (June 2011) |
| Enol | High | C | 2 | October 2010 | Wikipedia articles needing clarification (October 2010), Articles with unsourced statements (October 2010) |
| Enol ether | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Enrico Clementi | Low | Stub | 1 | Persondata templates without short description parameter | |
| Enrique Guzmán y Valle | Low | Start | 1 | January 2011 | Orphaned articles (January 2011) |
| Enthalpy | Top | C | 1 | September 2010 | Articles with unsourced statements (September 2010) |
| Enthalpy of atomization | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Enthalpy of sublimation | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Entropic force | Low | Start | 2 | June 2012 | Wikipedia articles needing clarification (June 2012), Articles with unsourced statements (June 2012) |
| Entropy | High | B | 2 | February 2013 | Articles to be merged (February 2013), Articles with unsourced statements (February 2013) |
| Entropy of fusion | Mid | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Entropy of vaporization | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Enyne | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Enzyme engineering | Low | Stub | 1 | December 2012 | Articles with too few wikilinks (December 2012) |
| Eon (distributed computing project) | Low | Stub | 1 | October 2012 | Articles with topics of unclear notability (October 2012) |
| Epitaxy | Low | C | 1 | February 2012 | Articles needing additional references (February 2012) |
| Equilibrium constant | High | C | 1 | November 2011 | Wikipedia articles needing page number citations (November 2011) |
| Erlenmeyer flask | Low | Start | 2 | June 2012 | Articles needing additional references (June 2012), Wikipedia articles needing factual verification (December 2012) |
| Ernest L. Eliel | Low | Stub | 1 | November 2012 | Articles with dead external links (November 2012) |
| Ernest Rutherford | High | C | 2 | November 2011 | Articles needing additional references (November 2011), Articles with unsourced statements (January 2013) |
| Ernst Otto Beckmann | Low | C | 2 | February 2013 | Articles needing additional references (February 2013), Persondata templates without short description parameter |
| Ernst Otto Fischer | High | C | 1 | Persondata templates without short description parameter | |
| Ester | High | C | 2 | March 2013 | Wikipedia articles that are too technical (March 2013), All articles needing expert attention |
| Ether | High | B | 1 | December 2007 | Articles needing additional references (December 2007) |
| Ethyl group | Mid | Stub | 1 | January 2013 | Articles to be merged (January 2013) |
| ETH Laboratory of Ion Beam Physics | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Eucerit | Low | Stub | 2 | May 2008 | Articles lacking reliable references (May 2008), Articles with unsourced statements (December 2010) |
| Eugene C. Bingham | Low | Stub | 1 | Persondata templates without short description parameter | |
| Eugen Bamberger | Low | Start | 1 | Persondata templates without short description parameter | |
| Eugen Baumann | Low | C | 1 | Persondata templates without short description parameter | |
| Eugen de Haën | Low | Stub | 1 | Persondata templates without short description parameter | |
| European Chemicals Agency | Low | Stub | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| European Commission number | Low | Start | 1 | July 2009 | Articles with unsourced statements (July 2009) |
| European Polymer Federation | Low | Stub | 1 | October 2012 | Articles with too few wikilinks (October 2012) |
| Evaporation | High | Start | 2 | January 2013 | Articles with unsourced statements (January 2013), All articles needing expert attention |
| Evolution of cells | Mid | Start | 1 | November 2009 | Wikipedia introduction cleanup (November 2009) |
| Exhaust gas | Unknown | Unassessed | 1 | April 2009 | Articles with unsourced statements (April 2009) |
| Exothermic reaction | High | C | 2 | July 2010 | Articles lacking sources (November 2011), Articles with unsourced statements (July 2010) |
| Exposure scenario | Unknown | Unassessed | 1 | September 2011 | Articles lacking sources (September 2011) |
| Extended periodic table | Low | C | 4 | April 2011 | Wikipedia articles needing clarification (April 2013), Articles containing potentially dated statements (April 2011), Articles with specifically marked weasel-worded phrases (April 2013), All articles needing expert attention |
| Extracellular adenylate cyclase | Low | Stub | 1 | December 2012 | Articles with too few wikilinks (December 2012) |
| F. Albert Cotton | Mid | B | 1 | Persondata templates without short description parameter | |
| Fabric softener | Unknown | Start | 2 | August 2011 | Articles lacking reliable references (July 2012), Wikipedia articles needing factual verification (August 2011) |
| Factors of polymer weathering | Low | C | 1 | August 2012 | Articles needing additional references (August 2012) |
| Faculty of Chemical Technology | Unknown | Start | 2 | October 2012 | Wikipedia articles needing copy edit (October 2012), Articles lacking sources (October 2012) |
| Faraday efficiency | Low | Start | 1 | July 2011 | Articles with unsourced statements (July 2011) |
| Farnham Maxwell-Lyte | Low | Start | 1 | Persondata templates without short description parameter | |
| Fas-associated phosphatase | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Faten Zahran Mohammed | Low | Stub | 2 | January 2011 | BLP articles lacking sources (January 2011), Persondata templates without short description parameter |
| Fatty alcohol | Mid | C | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| Fay and Wu's H | Low | Stub | 1 | April 2013 | Articles lacking in-text citations (April 2013) |
| Fürst-Plattner Rule | Low | Start | 1 | February 2009 | Orphaned articles (February 2009) |
| Fe–Ni clusters | Low | C | 1 | December 2012 | Orphaned articles (December 2012) |
| Fenestrane | Unknown | Unassessed | 1 | October 2008 | Articles with unsourced statements (October 2008) |
| Ferdinand Hurter | Low | B | 1 | Persondata templates without short description parameter | |
| Ferdinand Tiemann | Low | Start | 1 | July 2012 | Articles lacking sources (July 2012) |
| Fernico | Low | Stub | 1 | February 2013 | Articles needing additional references (February 2013) |
| Ferrate | Unknown | Unassessed | 1 | March 2011 | Articles with unsourced statements (March 2011) |
| Ferric chloride test | Low | Stub | 1 | June 2008 | Articles lacking sources (June 2008) |
| Ferrocerium | Unknown | Unassessed | 1 | April 2012 | Articles needing additional references (April 2012) |
| Ferromanganese nodules | Unknown | Stub | 1 | April 2012 | Articles with links needing disambiguation (April 2012) |
| Ferrotitanium | Low | Stub | 2 | August 2012 | Wikipedia pages needing cleanup (August 2012), Articles needing cleanup (August 2012) |
| Ferrous metallurgy | Unknown | Unassessed | 1 | July 2012 | Articles with unsourced statements (July 2012) |
| Ferroverdin | Unknown | Unassessed | 1 | July 2011 | Orphaned articles (July 2011) |
| FFC Cambridge process | Unknown | Start | 2 | October 2010 | Articles needing additional references (December 2010), Articles with unsourced statements (October 2010) |
| Fiberglass | Low | C | 1 | August 2009 | Articles with unsourced statements (August 2009) |
| Filter paper | Low | Start | 1 | June 2008 | Articles with unsourced statements (June 2008) |
| Fire | Top | B | 3 | January 2010 | Articles with dead external links (June 2011, September 2010), Articles with unsourced statements (January 2010) |
| Fire fighting foam | Mid | Start | 3 | October 2008 | Articles with dead external links (March 2009, May 2010), Articles lacking in-text citations (October 2008) |
| Fire striker | Unknown | Stub | 3 | January 2007 | Articles that may contain original research (April 2009), Articles lacking sources (January 2007), Articles with unsourced statements (December 2012) |
| Fischer–Hepp rearrangement | Low | Start | 1 | July 2009 | Articles with dead external links (July 2009) |
| Fischer–Speier esterification | Mid | Start | 2 | August 2011 | Wikipedia articles needing style editing (November 2012), Articles with unsourced statements (August 2011) |
| Flame | High | B | 3 | September 2009 | Articles that may contain original research (September 2009), Articles with unsourced statements (April 2012, March 2011) |
| Flame ionization detector | Low | Stub | 2 | October 2008 | Articles lacking in-text citations (July 2011), Wikipedia articles needing rewrite (October 2008) |
| Flame retardant | High | Start | 2 | April 2012 | Articles with unsourced statements (April 2012, April 2013) |
| Flavonoid | Mid | Start | 2 | September 2010 | Articles with dead external links (September 2010), Wikipedia articles in need of updating (December 2010) |
| Flavor masker | Low | Stub | 1 | December 2012 | Articles needing additional references (December 2012) |
| Flocculation | Mid | Start | 1 | April 2013 | Articles to be expanded (April 2013) |
| Florence flask | Low | Stub | 1 | November 2011 | Articles needing additional references (November 2011) |
| Flory–Schulz distribution | Unknown | Unassessed | 1 | March 2013 | Articles with topics of unclear notability (March 2013) |
| Fluid extract | Low | Stub | 3 | September 2008 | Wikipedia pages needing cleanup (September 2008), Articles needing cleanup (September 2008), Articles lacking sources (September 2008) |
| Fluorescein diacetate hydrolysis | Low | Stub | 1 | January 2007 | Articles needing additional references (January 2007) |
| Fluorinert | Low | Start | 1 | June 2012 | Articles with unsourced statements (June 2012) |
| Fluoroethyl | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Fluorophore | Mid | Start | 1 | February 2013 | Articles with links needing disambiguation (February 2013) |
| Flux (metabolism) | Low | Stub | 1 | November 2006 | Articles lacking sources (November 2006) |
| Foam | Unknown | Unassessed | 2 | December 2009 | Articles needing additional references (August 2012), Articles with unsourced statements (December 2009) |
| Folch solution | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Food additive | Low | Start | 1 | January 2011 | Articles lacking reliable references (January 2011) |
| Force field (chemistry) | Unknown | Unassessed | 3 | May 2010 | Articles with unsourced statements (August 2012, May 2010), Articles with specifically marked weasel-worded phrases (May 2010) |
| Formamidopyrimidine DNA glycosylase | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Fourier transform infrared spectroscopy | High | C | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| FOX reagent | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Fractional coordinates | Unknown | Unassessed | 1 | All articles needing expert attention | |
| Fraction (chemistry) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| François Diederich | Low | Stub | 2 | March 2013 | Articles lacking in-text citations (March 2013), Persondata templates without short description parameter |
| Francis Muguet | Low | Stub | 1 | Persondata templates without short description parameter | |
| Francis William Aston | High | Start | 1 | Persondata templates without short description parameter | |
| Frank Asaro | Low | C | 1 | Persondata templates without short description parameter | |
| Frank Kearton, Baron Kearton | Low | Start | 1 | Persondata templates without short description parameter | |
| Frank R. Wallace | Low | Start | 2 | February 2013 | Wikipedia pages needing cleanup (February 2013), Articles needing cleanup (February 2013) |
| Frans Maurits Jaeger | Low | Start | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| Franz-Joseph Müller von Reichenstein | Low | Start | 1 | Persondata templates without short description parameter | |
| Franz Hein | Low | Start | 1 | Persondata templates without short description parameter | |
| Frederick Augustus Genth | Low | Start | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| Fred Allison | Low | C | 1 | Persondata templates without short description parameter | |
| FreeON | Unknown | Stub | 3 | June 2010 | Wikipedia articles needing context (June 2010), Wikipedia introduction cleanup (June 2010), Orphaned articles (January 2011) |
| Freezing-point depression | Mid | C | 1 | February 2012 | Articles with unsourced statements (February 2012) |
| Free base | Mid | Stub | 1 | August 2011 | Articles with specifically marked weasel-worded phrases (August 2011) |
| Free element | Low | Stub | 1 | April 2011 | Articles lacking sources (April 2011) |
| Friction sensitivity | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Friedel–Crafts reaction | Mid | B | 1 | December 2011 | Articles with unsourced statements (December 2011) |
| Friedrich Accum | Mid | GA | 2 | April 2012 | Articles with dead external links (April 2012), Articles with links needing disambiguation (July 2012) |
| Friedrich Bergius | High | Start | 1 | Persondata templates without short description parameter | |
| Friedrich Emich | Low | Start | 1 | Persondata templates without short description parameter | |
| Friedrich Gustav Carl Emil Erlenmeyer | Low | Stub | 1 | Persondata templates without short description parameter | |
| Friedrich Krafft | Low | Stub | 1 | Persondata templates without short description parameter | |
| Friedrich Paneth | Low | Start | 1 | Persondata templates without short description parameter | |
| Friedrich Wöhler | Top | C | 1 | January 2013 | Articles needing additional references (January 2013) |
| Fritz Arndt | Low | Stub | 1 | Persondata templates without short description parameter | |
| Fritz Haber | High | C | 2 | September 2010 | Articles with dead external links (September 2010), Persondata templates without short description parameter |
| Fritz Laves | Low | Stub | 1 | Persondata templates without short description parameter | |
| Fritz Pregl | High | Start | 2 | January 2011 | Articles lacking in-text citations (January 2011), Persondata templates without short description parameter |
| Fritz ter Meer | Low | Stub | 2 | August 2011 | Articles with unsourced statements (August 2011), Persondata templates without short description parameter |
| Frost flower (sea ice) | Mid | C | 1 | April 2010 | Articles with unsourced statements (April 2010) |
| FsrA | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Fuel cell | Mid | B | 8 | September 2009 | Articles with dead external links (August 2011, September 2009, September 2010), Articles with unsourced statements (April 2013, August 2011, December 2011, February 2012, July 2012) |
| Fullerene | High | B | 2 | February 2007 | Articles with unsourced statements (February 2007, June 2008) |
| Functional analog | Low | Stub | 1 | January 2012 | Articles lacking sources (January 2012) |
| Functions of state | Low | Start | 1 | April 2009 | Articles lacking sources (April 2009) |
| Furanoflavonoid | Low | Stub | 1 | April 2013 | Articles lacking sources (April 2013) |
| Fyodor Grigoryevich Reshetnikov | Low | Stub | 1 | Persondata templates without short description parameter | |
| F number (chemistry) | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles needing additional references (December 2012) |
| Gab operon | Unknown | Unassessed | 1 | October 2012 | Articles needing additional references (October 2012) |
| GAI (Arabidopsis thaliana gene) | Low | Stub | 3 | February 2009 | Orphaned articles (February 2009), Wikipedia articles needing rewrite (February 2009), All articles needing expert attention |
| Galactoside | Unknown | Unassessed | 1 | April 2008 | Articles lacking sources (April 2008) |
| Galen D. Stucky | Unknown | Unassessed | 1 | December 2011 | Articles with dead external links (December 2011) |
| Gallagher–Hollander degradation | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Galvanic corrosion | Mid | C | 3 | June 2008 | Wikipedia articles needing page number citations (January 2011), Articles needing additional references (June 2008), Articles with unsourced statements (May 2012) |
| Galvanization | Mid | Start | 3 | May 2012 | Articles needing additional references (May 2012), Articles with unsourced statements (March 2013), Articles with specifically marked weasel-worded phrases (March 2013) |
| Gamma-endorphin | Low | Stub | 1 | February 2013 | Articles with too few wikilinks (February 2013) |
| Gamma spectroscopy | Mid | C | 1 | December 2010 | Articles lacking in-text citations (December 2010) |
| Gary E. Martin | Low | Start | 2 | April 2011 | BLP articles lacking sources (April 2011), Articles lacking reliable references (April 2011) |
| Gas | Top | B | 1 | January 2010 | Wikipedia articles needing style editing (January 2010) |
| Gasochromism | Low | Stub | 2 | August 2010 | Articles lacking in-text citations (August 2010), Articles needing additional references (August 2010) |
| Gasoline | Mid | B | 7 | June 2009 | Wikipedia articles needing clarification (June 2009), Articles with unsourced statements (August 2010, August 2012, July 2012, March 2012, October 2010, October 2012) |
| Gas chromatography | Mid | Start | 3 | March 2012 | Articles needing additional references (March 2012), Articles with unsourced statements (April 2013, December 2012) |
| Gas chromatography ion detector | Unknown | Unassessed | 3 | September 2008 | Articles needing cleanup (September 2008), Articles with sections that need to be turned into prose (September 2008), Articles lacking sources (June 2012) |
| Gas cracker | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Gas electron diffraction | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Gas to liquids | Low | Start | 1 | December 2008 | Articles needing additional references (December 2008) |
| Gaussian (software) | Low | Start | 1 | March 2012 | Articles with unsourced statements (March 2012) |
| Gérard Férey | Mid | Start | 1 | October 2012 | BLP articles lacking sources (October 2012) |
| Günther Wilke | Low | Stub | 1 | February 2013 | BLP articles lacking sources (February 2013) |
| Gel | Mid | C | 1 | August 2012 | Wikipedia articles needing clarification (August 2012) |
| Gelonin | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Gel point (petroleum) | Low | Stub | 1 | April 2011 | Articles lacking sources (April 2011) |
| Gem-Difluoroalkene | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Generalised compound | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| General chemistry | Mid | Start | 1 | February 2012 | Articles to be merged (February 2012) |
| Geneva Rules | Low | Stub | 2 | March 2010 | Orphaned articles (April 2010), Articles lacking sources (March 2010) |
| Geochemistry | Mid | Start | 1 | March 2012 | 1911 Britannica articles needing updates (March 2012) |
| George Andrew Olah | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| George C. Schatz | Unknown | Unassessed | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| George de Hevesy | High | Start | 1 | Persondata templates without short description parameter | |
| George Ernest Gibson | Mid | Start | 1 | Persondata templates without short description parameter | |
| George M. Martin | Low | Stub | 2 | November 2009 | BLP articles lacking sources (November 2009), Persondata templates without short description parameter |
| George Sarton | Low | Start | 1 | December 2008 | Articles needing additional references (December 2008) |
| George Thomas Beilby | Low | Stub | 1 | October 2010 | Articles with dead external links (October 2010) |
| Georgius Agricola | Mid | C | 1 | January 2013 | Articles lacking in-text citations (January 2013) |
| Gerard Parkin | Low | Stub | 1 | Persondata templates without short description parameter | |
| Gerber method | Unknown | Unassessed | 1 | December 2010 | Wikipedia spam cleanup (December 2010) |
| Gerhard Ecker | Low | Start | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| Gerhard Herzberg | High | Stub | 1 | Persondata templates without short description parameter | |
| Gerhard Krüss | Low | Start | 1 | Persondata templates without short description parameter | |
| Gerhart Jander | Low | Start | 1 | January 2011 | Orphaned articles (January 2011) |
| GHS hazard statement | Mid | Start | 1 | February 2013 | Articles with unsourced statements (February 2013) |
| Giacomo Luigi Ciamician | Mid | Stub | 2 | October 2010 | Articles with dead external links (October 2010), Persondata templates without short description parameter |
| Gideon Henderson | Low | Stub | 2 | November 2010 | BLP articles lacking sources (November 2010), Persondata templates without short description parameter |
| Gilbert N. Lewis | High | C | 1 | November 2009 | Articles with unsourced statements (November 2009) |
| Girdler sulfide process | Mid | Start | 1 | March 2011 | Articles with unsourced statements (March 2011) |
| Glass electrode | Low | C | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Glass tube | Mid | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Glenn T. Seaborg | High | B | 4 | December 2010 | Articles with dead external links (August 2012, December 2010, October 2011), Articles with unsourced statements (June 2012) |
| Globally Harmonized System of Classification and Labelling of Chemicals | Mid | Start | 2 | May 2008 | Articles with dead external links (May 2010), Wikipedia articles needing style editing (May 2008) |
| Glossary of chemistry terms | Mid | Start | 2 | January 2010 | Articles to be expanded (January 2010), Articles with links needing disambiguation (August 2011) |
| Glovebox | Mid | Start | 1 | April 2011 | Articles needing additional references (April 2011) |
| Glow stick | Low | Start | 1 | October 2011 | Articles with disputed statements (October 2011) |
| Glucosinolate | Unknown | Unassessed | 2 | January 2013 | Articles needing additional references (January 2013), Articles with unsourced statements (January 2013) |
| Glycan | Low | Start | 1 | May 2012 | Articles needing additional references (May 2012) |
| Glycation | Unknown | Unassessed | 2 | November 2009 | Articles needing additional references (November 2009), Articles with unsourced statements (November 2009) |
| Glycerinated gelatin | Unknown | Unassessed | 4 | May 2007 | Wikipedia articles needing context (October 2009), Wikipedia introduction cleanup (October 2009), Orphaned articles (September 2008), Articles lacking sources (May 2007) |
| Glycerolysis | Unknown | Unassessed | 2 | June 2008 | Orphaned articles (February 2009), Wikipedia articles needing reorganization (June 2008) |
| Glyceryl hydroxystearate | Unknown | Unassessed | 2 | October 2012 | Wikipedia references cleanup (October 2012), Articles with too few wikilinks (October 2012) |
| Glycoazodyes | Low | Stub | 1 | February 2013 | Articles with too few wikilinks (February 2013) |
| Glycol ethers | Low | Start | 1 | December 2010 | Articles with unsourced statements (December 2010) |
| Glycomimetic | Unknown | Unassessed | 1 | September 2011 | Orphaned articles (September 2011) |
| Glycoprotein | High | Start | 1 | December 2007 | Articles with unsourced statements (December 2007) |
| Glycosyl | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Glycylglycine | Unknown | Unassessed | 1 | July 2012 | Articles with unsourced statements (July 2012) |
| Gold cyanidation | Low | C | 4 | September 2010 | Articles with dead external links (February 2012, January 2013), Articles with unsourced statements (September 2010), Articles with specifically marked weasel-worded phrases (February 2012) |
| Gold Dust Twins | Unknown | Unassessed | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| Gold halide | Low | Start | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Gold number | Low | Stub | 1 | August 2009 | Orphaned articles (August 2009) |
| Gold plating | Low | Start | 2 | January 2013 | Wikipedia articles needing clarification (April 2013), Articles with unsourced statements (January 2013) |
| Gold sol | Low | Stub | 1 | September 2011 | Articles lacking sources (September 2011) |
| Gonocyte | Low | Stub | 1 | April 2008 | Articles with unsourced statements (April 2008) |
| Gordon Aylward | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Gottfried Osann | Low | Stub | 1 | Persondata templates without short description parameter | |
| Graduated cylinder | Low | Stub | 1 | July 2012 | Articles needing additional references (July 2012) |
| Graham Fleming | Low | Start | 1 | Persondata templates without short description parameter | |
| Graham John Hills | Low | Start | 1 | Persondata templates without short description parameter | |
| Gravity (chemistry) | Low | Stub | 2 | December 2009 | Articles lacking sources (December 2009, January 2011) |
| Green chemistry | High | B | 2 | March 2010 | Wikipedia articles needing clarification (March 2010), Articles with unsourced statements (June 2011) |
| Green chemistry metrics | Low | Start | 1 | February 2007 | Articles lacking sources (February 2007) |
| Green death | Low | Stub | 2 | October 2008 | Orphaned articles (October 2008), Articles needing additional references (October 2008) |
| Grignard reaction | High | B | 1 | January 2012 | Articles with unsourced statements (January 2012) |
| GROMOS | Unknown | Stub | 3 | October 2008 | Articles lacking in-text citations (October 2008), Wikipedia articles that are too technical (November 2012), All articles needing expert attention |
| Grotthuss mechanism | Mid | Start | 2 | February 2011 | Wikipedia articles needing clarification (February 2011), Articles with specifically marked weasel-worded phrases (February 2011) |
| Ground glass joint | Low | C | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Group (periodic table) | High | Start | 1 | December 2012 | Articles with unsourced statements (December 2012) |
| Guido Donegani | Low | Start | 5 | May 2011 | BLP articles lacking sources (January 2012), Wikipedia articles needing clarification (May 2011), Articles with topics of unclear notability (May 2011), Articles with unsourced statements (May 2011), Persondata templates without short description parameter |
| Guido Goldschmiedt | Low | C | 1 | Persondata templates without short description parameter | |
| Gum guaicum | Low | Stub | 1 | April 2010 | Articles needing additional references (April 2010) |
| Gustavus Detlef Hinrichs | Mid | C | 2 | July 2012 | Articles lacking in-text citations (July 2012), Articles with unsourced statements (July 2012) |
| Guy Bertrand (chemist) | Low | Stub | 1 | Persondata templates without short description parameter | |
| Guy Lloyd-Jones | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Gu Yidong | Low | Stub | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| GWASdb | Low | Stub | 2 | October 2011 | Accuracy disputes (October 2011), Orphaned articles (December 2011) |
| H. Christopher Longuet-Higgins | Low | B | 3 | October 2012 | Wikipedia pages needing cleanup (October 2012), Articles needing cleanup (October 2012), Persondata templates without short description parameter |
| Haber process | High | B | 2 | August 2012 | Wikipedia articles needing clarification (November 2012), Articles with unsourced statements (August 2012) |
| Half-reaction | Unknown | Unassessed | 1 | May 2010 | Articles needing additional references (May 2010) |
| Hall–Héroult process | Mid | C | 1 | February 2012 | Wikipedia introduction cleanup (February 2012) |
| Haloacetic acids | Low | Start | 1 | October 2009 | Articles with unsourced statements (October 2009) |
| Haloalkane | High | B | 1 | November 2012 | Articles with unsourced statements (November 2012) |
| Halocarbon | Low | Start | 1 | June 2010 | Articles with dead external links (June 2010) |
| Halochromism | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Haloform reaction | High | C | 1 | September 2007 | Articles with unsourced statements (September 2007) |
| Halogenated ether | Mid | C | 1 | December 2009 | Articles lacking sources (December 2009) |
| Halohydrin | Low | Start | 2 | December 2009 | Articles lacking sources (December 2009, February 2011) |
| Halorespiration | Low | Stub | 1 | October 2008 | Articles needing additional references (October 2008) |
| Hammett acidity function | Mid | Start | 1 | November 2007 | Articles with unsourced statements (November 2007) |
| Handbook of Electrochemistry | Low | Stub | 1 | September 2010 | Articles lacking reliable references (September 2010) |
| Handbook of Porphyrin Science | Low | Stub | 3 | August 2009 | Articles with topics of unclear notability (August 2009), Orphaned articles (January 2011), Articles needing additional references (August 2009) |
| Hans Fischer | High | Start | 1 | Persondata templates without short description parameter | |
| Hans Freeman | Mid | GA | 1 | Persondata templates without short description parameter | |
| Hans Leopold Meyer | Low | Stub | 2 | October 2010 | Articles with dead external links (October 2010), Persondata templates without short description parameter |
| Hans Meerwein | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Hans von Euler-Chelpin | Mid | Stub | 3 | December 2012 | Articles to be expanded (December 2012), Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Hans von Pechmann | Low | Stub | 1 | Persondata templates without short description parameter | |
| Hapticity | Top | B | 1 | July 2010 | Articles with unsourced statements (July 2010) |
| Harmon Northrop Morse | Low | C | 1 | Persondata templates without short description parameter | |
| Harold Ellingham | Low | Stub | 1 | Persondata templates without short description parameter | |
| Harold Urey | High | C | 1 | June 2009 | Articles with unsourced statements (June 2009) |
| Harrison Brown | Low | Start | 1 | Persondata templates without short description parameter | |
| Harry Coover | Mid | Start | 3 | June 2010 | Articles with dead external links (November 2010), Articles with unsourced statements (April 2012, June 2010) |
| Harry F. Noller | Low | Start | 2 | January 2011 | Articles with unsourced statements (January 2011), Persondata templates without short description parameter |
| Harry R. Allcock | Low | Start | 1 | Persondata templates without short description parameter | |
| Hazel Alden Reason | Unknown | Stub | 2 | November 2012 | Articles needing additional references (November 2012), Persondata templates without short description parameter |
| Health effects of natural phenols and polyphenols | Low | Start | 4 | December 2010 | Articles to be expanded (March 2013), Wikipedia articles needing page number citations (December 2010), Articles with unsourced statements (January 2011, March 2013) |
| Health effects of radon | Low | B | 7 | April 2010 | Wikipedia articles needing clarification (July 2010, June 2010), Articles with dead external links (November 2010, October 2010), Articles with unsourced statements (April 2010, July 2010, June 2010) |
| Heatproof mat | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Heat capacity | High | C | 4 | August 2008 | Articles with unsourced statements (April 2010, August 2008, July 2009, November 2009) |
| Heat capacity ratio | Low | Start | 1 | June 2008 | Articles to be expanded (June 2008) |
| Heat of combustion | High | Start | 2 | May 2011 | Articles with unsourced statements (May 2011), Articles with links needing disambiguation (January 2013) |
| Heavy liquid | Unknown | Unassessed | 1 | April 2013 | Articles with unsourced statements (April 2013) |
| Heinrich Jacob Goldschmidt | Low | Start | 1 | Persondata templates without short description parameter | |
| Heinz A. Lowenstam | Low | Start | 1 | Persondata templates without short description parameter | |
| Heinz Gerischer | Mid | Start | 1 | Persondata templates without short description parameter | |
| Helen Murray Free | Mid | Start | 1 | Persondata templates without short description parameter | |
| Helium ionization detector | Low | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Hemocyanin | Low | Start | 1 | April 2007 | Articles with unsourced statements (April 2007) |
| Henri Moissan | High | C | 1 | June 2012 | Articles needing additional references (June 2012) |
| Henry Bollmann Condy | Low | Stub | 1 | Persondata templates without short description parameter | |
| Henry Bradford Nason | Low | Start | 1 | Persondata templates without short description parameter | |
| Henry Drysdale Dakin | Low | Stub | 1 | Persondata templates without short description parameter | |
| Henry M. Fales | Low | Start | 1 | Persondata templates without short description parameter | |
| Henry Minchin Noad | Low | Start | 1 | Persondata templates without short description parameter | |
| Henry Moseley | High | C | 1 | April 2013 | Articles with unsourced statements (April 2013) |
| Henry Rapoport | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Henry Wurtz | Mid | Stub | 1 | November 2010 | Orphaned articles (November 2010) |
| Herbert McLeod | Low | Start | 1 | Persondata templates without short description parameter | |
| Herbicide | High | C | 9 | June 2009 | Wikipedia articles needing clarification (January 2012), Articles containing potentially dated statements (1992), Articles with minor POV problems (December 2011), Wikipedia articles needing page number citations (January 2013), Articles needing additional references (August 2011), Articles with unsourced statements (August 2011, June 2009), Articles with specifically marked weasel-worded phrases (December 2012, July 2010) |
| Herbicide safener | Low | Stub | 1 | June 2011 | Articles lacking in-text citations (June 2011) |
| Hercules Inc. | Mid | Start | 1 | October 2010 | Articles with unsourced statements (October 2010) |
| Hermann Hellriegel | Mid | Stub | 2 | March 2013 | Articles with links needing disambiguation (March 2013), Persondata templates without short description parameter |
| Hermann Julius Grüneberg | Low | Stub | 1 | Persondata templates without short description parameter | |
| Hermann Leuchs | Low | Stub | 1 | Persondata templates without short description parameter | |
| Hermann Wilhelm Vogel | Mid | Start | 2 | May 2012 | Articles needing additional references (May 2012), Articles with unsourced statements (May 2012) |
| Herz reaction | Mid | Start | 1 | December 2010 | Articles needing additional references (December 2010) |
| Heterodiamond | Unknown | Unassessed | 1 | January 2008 | Articles needing additional references (January 2008) |
| Heterosaccharide | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Heterotelergone | Low | Stub | 1 | April 2013 | Articles needing additional references (April 2013) |
| Hexafluoride | Mid | C | 2 | July 2012 | Articles that may contain original research (July 2012), Articles with unsourced statements (July 2012) |
| Hexamine fuel tablet | Low | Start | 1 | July 2007 | Articles needing additional references (July 2007) |
| Hi-Fi Digimonster | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| High-level radioactive waste management | Low | GA | 2 | January 2010 | Articles with dead external links (April 2012), Wikipedia articles in need of updating (January 2010) |
| High-performance liquid chromatography | Low | B | 5 | October 2007 | Wikipedia articles that are too technical (June 2010), Articles with unsourced statements (February 2009, October 2007, October 2008), All articles needing expert attention |
| Higher alkanes | Low | Start | 1 | January 2013 | Articles with specifically marked weasel-worded phrases (January 2013) |
| Higher Chemical College of the Russian Academy of Sciences | Low | Stub | 1 | April 2011 | Articles lacking reliable references (April 2011) |
| High fructose corn syrup | Low | B | 2 | December 2012 | Articles with unsourced statements (December 2012), Wikipedia articles needing factual verification (February 2013) |
| History of chemistry | High | B | 5 | August 2007 | Articles with unsourced statements (August 2007, August 2012, June 2008, May 2010), Wikipedia articles needing factual verification (June 2010) |
| HIV drug resistance | Low | Stub | 1 | All articles needing expert attention | |
| Hofmann voltameter | Unknown | Unassessed | 1 | October 2008 | Articles needing additional references (October 2008) |
| Holographic sensor | Low | Stub | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Homeotropic alignment | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Homoassociation | Low | C | 1 | April 2012 | Articles needing additional references (April 2012) |
| Homochirality | Mid | B | 1 | March 2008 | Articles with unsourced statements (March 2008) |
| Homogeneity and heterogeneity | Mid | Stub | 3 | September 2010 | Wikipedia articles needing clarification (September 2010), Articles with unsourced statements (May 2011, September 2010) |
| Homologous series | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Homology (chemistry) | Low | Stub | 1 | November 2011 | Articles needing additional references (November 2011) |
| Homonuclear molecule | Unknown | Unassessed | 1 | September 2009 | Articles lacking sources (September 2009) |
| Homopolysaccharide | Unknown | Stub | 2 | September 2008 | Articles with topics of unclear notability (September 2008), All articles needing expert attention |
| Hopp–Woods scale | Low | Stub | 2 | October 2010 | Orphaned articles (April 2012), Articles lacking sources (October 2010) |
| Horia Hulubei | Low | Stub | 1 | Persondata templates without short description parameter | |
| Hose barb | Unknown | Unassessed | 1 | June 2009 | Articles lacking sources (June 2009) |
| Host-Cell Reactivation | Low | Stub | 2 | February 2008 | Orphaned articles (February 2009), Articles lacking sources (February 2008) |
| Hot air oven | Low | Stub | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| Hot atom | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Hot plate | Low | Start | 2 | October 2010 | Articles needing additional references (October 2010), Articles with unsourced statements (September 2011) |
| Houben-Weyl Methods of Organic Chemistry | Unknown | Unassessed | 1 | August 2009 | Articles needing additional references (August 2009) |
| Howard Zimmerman | Low | C | 1 | October 2010 | Articles with dead external links (October 2010) |
| Hugo Erdmann | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Hugo Weidel | Low | Start | 1 | October 2010 | Articles with dead external links (October 2010) |
| Humidity indicator | Low | Stub | 2 | August 2010 | Wikipedia pages needing cleanup (August 2010), Articles needing cleanup (August 2010) |
| Hunter process | High | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Hybrid vapour phase epitaxy | Low | Stub | 5 | April 2008 | Articles with topics of unclear notability (April 2008), Orphaned articles (February 2009), Articles needing additional references (April 2008), Wikipedia articles that are too technical (April 2008), All articles needing expert attention |
| Hydration reaction | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Hydride | Mid | B | 3 | August 2008 | Articles to be merged (August 2012), Articles with unsourced statements (August 2008, July 2010) |
| Hydrogenated starch hydrosylate | Unknown | Unassessed | 1 | May 2009 | Articles with specifically marked weasel-worded phrases (May 2009) |
| Hydrogen embrittlement | Unknown | Unassessed | 3 | April 2010 | Wikipedia articles needing clarification (March 2013), Articles to be expanded (January 2013), Articles with unsourced statements (April 2010) |
| Hydrohalogenation | Mid | Start | 1 | February 2009 | Articles with unsourced statements (February 2009) |
| Hydronium | High | B | 1 | July 2011 | Articles with unsourced statements (July 2011) |
| Hydron (chemistry) | High | Start | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| Hydroxide | Top | C | 2 | January 2013 | Wikipedia articles needing clarification (January 2013), Articles with unsourced statements (January 2013) |
| Hydroxyl | High | Start | 3 | December 2011 | Wikipedia pages needing cleanup (December 2011), Articles needing cleanup (December 2011), Articles needing additional references (December 2011) |
| Hydroxyl radical | Low | C | 1 | May 2010 | Articles needing additional references (May 2010) |
| Hygroscopy | High | Start | 2 | July 2009 | Articles needing additional references (July 2009), Articles with unsourced statements (September 2010) |
| Hyperbolic coordinates | Unknown | Unassessed | 1 | June 2010 | Articles that may contain original research (June 2010) |
| Hyperconjugation | Mid | B | 1 | January 2011 | Wikipedia articles needing clarification (January 2011) |
| Hypersaturation | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Hypochlorite | Low | Stub | 3 | February 2009 | Articles needing additional references (February 2009), Articles with unsourced statements (July 2010, November 2009) |
| Hyponitrite | Low | Start | 1 | April 2010 | Articles with unsourced statements (April 2010) |
| Hyposulfite | Low | Stub | 1 | June 2012 | Articles with unsourced statements (June 2012) |
| Hypothetical types of biochemistry | Low | Start | 7 | May 2010 | Articles containing potentially dated statements (1998), Articles with dead external links (May 2010), Articles needing additional references (August 2012, October 2012), Articles with unsourced statements (April 2011, August 2012, January 2012) |
| Hypsochromic shift | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Ice | Unknown | Unassessed | 2 | March 2012 | Articles containing potentially dated statements (2013), Vague or ambiguous time (March 2012) |
| Ice XII | Mid | Stub | 1 | August 2012 | Articles lacking in-text citations (August 2012) |
| Ida Noddack | Mid | Start | 3 | April 2009 | Wikipedia articles needing clarification (November 2009), Articles with dead external links (May 2009), Articles with unsourced statements (April 2009) |
| Idrialin | Unknown | Unassessed | 1 | February 2009 | Orphaned articles (February 2009) |
| IGEPAL CA-630 | Low | Stub | 1 | July 2010 | Articles needing additional references (July 2010) |
| Ilya Prigogine | High | C | 2 | October 2010 | Articles lacking in-text citations (October 2010), Articles with unsourced statements (March 2012) |
| Imine | Mid | C | 1 | September 2010 | Articles with dead external links (September 2010) |
| Imine Diels–Alder reaction | Low | C | 1 | April 2013 | Articles with too few wikilinks (April 2013) |
| Immunochemistry | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| InChI Trust | Low | Stub | 4 | April 2011 | Wikipedia articles with possible conflicts of interest (November 2011), Articles to be merged (November 2011), Articles with topics of unclear notability (November 2011), Articles needing additional references (April 2011) |
| Index of chemistry articles | Mid | B | 1 | June 2011 | Articles with links needing disambiguation (June 2011) |
| Indium-mediated allylation | Unknown | Unassessed | 3 | August 2012 | Wikipedia articles that are too technical (August 2012), Articles with unsourced statements (August 2012), All articles needing expert attention |
| Inductive cleavage | Low | Stub | 1 | April 2013 | Orphaned articles (April 2013) |
| Inductive effect | Mid | Start | 2 | July 2012 | Wikipedia pages needing cleanup (July 2012), Articles needing cleanup (July 2012) |
| Industrial Bio-Test Laboratories | Unknown | Unassessed | 2 | February 2013 | Wikipedia articles needing page number citations (February 2013), Articles with specifically marked weasel-worded phrases (February 2013) |
| Indus Pharmaceuticals | Low | Stub | 2 | October 2012 | Orphaned articles (November 2012), Articles lacking sources (October 2012) |
| Inergen | Unknown | Unassessed | 2 | September 2012 | Articles lacking in-text citations (October 2012), Articles with a promotional tone (September 2012) |
| Inert | Mid | Start | 1 | September 2007 | Articles needing additional references (September 2007) |
| Informative site | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Initiation (chemistry) | Mid | Stub | 1 | May 2010 | Articles needing additional references (May 2010) |
| Inner sphere electron transfer | Low | C | 1 | June 2010 | Wikipedia articles needing clarification (June 2010) |
| Inorganic compounds by element | Low | List | 1 | August 2008 | Incomplete lists (August 2008) |
| Inorganic Crystal Structure Database | Low | Stub | 1 | Articles containing potentially dated statements (2013) | |
| Inorganic ions | Low | Stub | 1 | March 2011 | Articles lacking sources (March 2011) |
| Institute for Radium Research, Vienna | Low | Start | 1 | April 2010 | Articles with unsourced statements (April 2010) |
| Institute for the History of Aluminium | Low | Stub | 2 | July 2008 | Articles needing additional references (July 2008), Articles with too few wikilinks (October 2012) |
| Instrumentation in petrochemical industries | Unknown | Stub | 1 | November 2009 | Articles with topics of unclear notability (November 2009) |
| Interface (chemistry) | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Intermolecular force | Top | Start | 3 | September 2009 | Articles to be expanded (September 2009), Articles with unsourced statements (July 2012, November 2012) |
| Internal Coordinate Mechanics | Low | Stub | 1 | All articles needing expert attention | |
| International Chemical Identifier | Mid | Start | 1 | November 2011 | Articles to be merged (November 2011) |
| International Liquid Crystal Society | Unknown | Unassessed | 1 | October 2010 | Articles with dead external links (October 2010) |
| International Programme on Chemical Safety | Low | Stub | 1 | May 2010 | Articles to be expanded (May 2010) |
| Interpnictogen | Low | Stub | 4 | September 2012 | Wikipedia articles needing clarification (September 2012), Wikipedia introduction cleanup (September 2012), Wikipedia articles that are too technical (September 2012), All articles needing expert attention |
| Intramolecular Diels–Alder cycloaddition | Mid | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Intruder state | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Inversion barrier | Mid | Stub | 1 | April 2010 | Articles lacking sources (April 2010) |
| In situ polymerization | Unknown | Unassessed | 3 | April 2009 | Wikipedia pages needing cleanup (April 2009), Articles needing cleanup (April 2009), Articles needing additional references (April 2009) |
| Iodine oxide | Low | Stub | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| Iodine test | Mid | Start | 1 | October 2012 | Articles lacking in-text citations (October 2012) |
| Ion | Top | Start | 1 | December 2007 | Articles needing additional references (December 2007) |
| Ionic atmosphere | Low | Stub | 1 | June 2009 | Articles lacking sources (June 2009) |
| Ionic bond | High | C | 1 | November 2009 | Articles needing additional references (November 2009) |
| Ionic compound | Mid | C | 1 | June 2011 | Articles needing additional references (June 2011) |
| Ionic crystal | Low | Stub | 1 | September 2010 | Articles with dead external links (September 2010) |
| Ionic liquid | High | B | 1 | December 2009 | Wikipedia articles needing clarification (December 2009) |
| Ionic potential | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Ionic strength | Mid | Start | 1 | October 2008 | Articles needing additional references (October 2008) |
| Ionochromism | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Ion chromatography | Low | Stub | 1 | March 2010 | Articles lacking in-text citations (March 2010) |
| Ion Exchange Letters | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Iota Sigma Pi | Low | Stub | 4 | November 2012 | Articles needing cleanup (November 2012), Articles with sections that need to be turned into prose (November 2012), Articles lacking sources (November 2012), Articles with too few wikilinks (January 2013) |
| Irina Beletskaya | Low | Stub | 2 | November 2012 | BLP articles lacking sources (November 2012), Persondata templates without short description parameter |
| Iron-based superconductor | Low | Start | 1 | December 2009 | Articles with unsourced statements (December 2009) |
| Iron oxide cycle | Low | Stub | 1 | September 2011 | Wikipedia articles needing context (September 2011) |
| Iron oxide nanoparticles | Unknown | Unassessed | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Irving Langmuir | High | B | 1 | Persondata templates without short description parameter | |
| Isay reaction | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Island of stability | Mid | B | 3 | July 2012 | Wikipedia articles needing clarification (April 2013), Articles with disputed statements (July 2012), Articles with unsourced statements (July 2012) |
| Isocyanide | Mid | Stub | 1 | December 2010 | Articles with unsourced statements (December 2010) |
| Isodiapher | Unknown | Stub | 2 | July 2010 | Articles lacking sources (July 2010), Articles with unsourced statements (March 2013) |
| Isohydric principle | Unknown | Unassessed | 1 | August 2009 | Orphaned articles (August 2009) |
| Isothiocyanate | Mid | Start | 1 | July 2012 | Articles with unsourced statements (July 2012) |
| Isotopic labeling | Mid | C | 2 | November 2011 | Articles needing additional references (November 2011), Articles with unsourced statements (November 2011) |
| Isotopic Ratio Outlier Analysis (IROA) | Low | Start | 8 | March 2013 | Wikipedia articles with possible conflicts of interest (March 2013), Wikipedia articles needing copy edit (March 2013), Articles with topics of unclear notability (March 2013), Orphaned articles (April 2013), Articles with a promotional tone (March 2013), Articles needing sections (March 2013), Unreviewed new articles created via the Article Wizard (March 2013), All articles needing expert attention |
| Isotopomers | Unknown | Unassessed | 1 | March 2012 | Articles with unsourced statements (March 2012) |
| Italma | Low | Stub | 1 | December 2007 | Orphaned articles (December 2007) |
| IUPAC nomenclature of inorganic chemistry | Mid | Start | 1 | March 2012 | Articles to be merged (March 2012) |
| IUPAC nomenclature of inorganic chemistry 2005 | Mid | C | 1 | March 2012 | Articles with unsourced statements (March 2012) |
| IUPAC nomenclature of organic chemistry | High | Start | 1 | January 2012 | Articles with unsourced statements (January 2012) |
| Ivan Nazarov | Low | Stub | 1 | Persondata templates without short description parameter | |
| Ivan Ostromislensky | Low | C | 1 | Persondata templates without short description parameter | |
| Ivory | Mid | Start | 2 | June 2007 | Articles with unsourced statements (June 2007), Articles with specifically marked weasel-worded phrases (May 2013) |
| J. R. Partington | Mid | Start | 1 | Persondata templates without short description parameter | |
| Jacobsen rearrangement | Mid | Start | 1 | February 2009 | Orphaned articles (February 2009) |
| Jacobus Henricus van 't Hoff | High | B | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Jacques Prost | Low | Stub | 1 | Persondata templates without short description parameter | |
| Jaffe reaction | Low | Unassessed | 1 | Persondata templates without short description parameter | |
| Jakob Meisenheimer | Low | Stub | 1 | Persondata templates without short description parameter | |
| James B. Sumner | High | Start | 1 | February 2013 | Articles needing additional references (February 2013) |
| James Bassham | Low | Stub | 2 | September 2010 | BLP articles lacking sources (September 2010), Persondata templates without short description parameter |
| James Cullen Martin | Low | Stub | 1 | Persondata templates without short description parameter | |
| James Cutbush | Low | Stub | 1 | Persondata templates without short description parameter | |
| James Freeman Dana | Low | Stub | 2 | April 2013 | Articles lacking sources (April 2013), Persondata templates without short description parameter |
| James Walker (chemist) | Low | Start | 1 | February 2013 | Articles needing additional references (February 2013) |
| Janus-faced molecule | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Japp–Maitland condensation | Mid | Start | 1 | January 2011 | Orphaned articles (January 2011) |
| Jaroslav Heyrovský | Mid | B | 1 | Persondata templates without short description parameter | |
| Jöns Jacob Berzelius | High | Start | 2 | January 2010 | Articles needing additional references (January 2010), Articles with unsourced statements (March 2011) |
| Jürgen Gmehling | Low | Start | 3 | September 2011 | Articles with a promotional tone (September 2011), Articles needing additional references (September 2011), Persondata templates without short description parameter |
| Jean-Marie Basset | Low | Stub | 2 | March 2010 | BLP articles lacking sources (March 2010), Persondata templates without short description parameter |
| Jean-Marie Lehn | Low | Start | 1 | February 2013 | BLP articles lacking sources (February 2013) |
| Jean-Pierre Hansen | Low | Start | 1 | Persondata templates without short description parameter | |
| Jean Fréchet | Unknown | Stub | 2 | February 2013 | BLP articles lacking sources (February 2013), Persondata templates without short description parameter |
| Jeehiun Lee | Unknown | Stub | 4 | February 2009 | BLP articles lacking sources (November 2012), Articles with topics of unclear notability (November 2012), Orphaned articles (February 2009), Articles lacking reliable references (November 2012) |
| Jeffery W. Kelly | Unknown | Unassessed | 2 | December 2010 | BLP articles lacking sources (December 2010), Persondata templates without short description parameter |
| Jeremias Benjamin Richter | Low | Start | 2 | November 2009 | Articles lacking in-text citations (November 2009), Persondata templates without short description parameter |
| Jeremy R. Knowles | Low | Start | 2 | February 2013 | Articles needing additional references (February 2013), Persondata templates without short description parameter |
| Jerome J. Workman, Jr. | Unknown | Unassessed | 2 | December 2011 | Articles needing cleanup (December 2011), Articles needing link rot cleanup (December 2011) |
| Jerome Karle | Low | C | 1 | Persondata templates without short description parameter | |
| Jerry March | Low | Stub | 1 | Persondata templates without short description parameter | |
| Jing Li (chemist) | Unknown | Stub | 5 | June 2008 | BLP articles lacking sources (November 2012), Articles lacking in-text citations (November 2012), Orphaned articles (June 2008), Articles lacking reliable references (November 2012), Persondata templates without short description parameter |
| Joanna S. Fowler | Mid | Start | 6 | December 2007 | BLP articles lacking sources (November 2012), Articles to be expanded (December 2012), Articles lacking in-text citations (November 2012), Articles with a promotional tone (December 2007), Wikipedia articles needing style editing (April 2008), Persondata templates without short description parameter |
| Joel Henry Hildebrand | Low | C | 2 | March 2013 | Articles needing additional references (March 2013), Persondata templates without short description parameter |
| Johannes Wislicenus | Low | Start | 1 | December 2011 | Articles with unsourced statements (December 2011) |
| Johann Florian Heller | Low | C | 1 | Persondata templates without short description parameter | |
| Johann Friedrich Cartheuser | Low | Stub | 1 | Persondata templates without short description parameter | |
| Johann Georg Anton Geuther | Low | C | 1 | Persondata templates without short description parameter | |
| Johann Mulzer | Low | Stub | 1 | Persondata templates without short description parameter | |
| John Augustus Just | Low | Start | 1 | Persondata templates without short description parameter | |
| John Bockris | Low | Start | 2 | September 2012 | Articles with links needing disambiguation (September 2012), Persondata templates without short description parameter |
| John Dalton | Top | B | 4 | March 2010 | Articles with dead external links (November 2010), Articles needing additional references (October 2011), Articles with unsourced statements (December 2011, March 2010) |
| John Davy (chemist) | Low | Start | 1 | Persondata templates without short description parameter | |
| John Eddowes Bowman the Younger | Low | Stub | 1 | Persondata templates without short description parameter | |
| John H. Seinfeld | Unknown | Unassessed | 5 | July 2009 | BLP articles lacking sources (October 2011), Wikipedia pages needing cleanup (July 2009), Articles needing cleanup (July 2009), Articles with topics of unclear notability (October 2011), Wikipedia articles needing style editing (July 2009) |
| John Hall Gladstone | Unknown | Start | 1 | Persondata templates without short description parameter | |
| John Howard Northrop | High | Start | 1 | Persondata templates without short description parameter | |
| John Lennard-Jones | Unknown | Start | 1 | Persondata templates without short description parameter | |
| John Mayow | Low | B | 1 | Persondata templates without short description parameter | |
| John Rose (chemist) | Low | Start | 1 | Persondata templates without short description parameter | |
| John Shipley Rowlinson | Low | Stub | 1 | Persondata templates without short description parameter | |
| John Tedder, 2nd Baron Tedder | Low | Start | 1 | February 2010 | Articles lacking in-text citations (February 2010) |
| John Ulric Nef (chemist) | Low | Stub | 2 | March 2013 | Articles needing additional references (March 2013), Persondata templates without short description parameter |
| John Yates (chemist) | Low | Stub | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| Josef Maria Eder | Low | Start | 2 | October 2010 | Articles with dead external links (October 2010), Persondata templates without short description parameter |
| Joseph Black | High | Start | 2 | April 2012 | Articles with dead external links (April 2012), Persondata templates without short description parameter |
| Joseph Francisco | Low | Start | 1 | Persondata templates without short description parameter | |
| Joseph J. Katz | Mid | Start | 2 | September 2012 | Wikipedia introduction cleanup (September 2012), Wikipedia references cleanup (September 2012) |
| Joseph Proust | Mid | Start | 2 | August 2011 | Articles with dead external links (August 2011), Articles with disputed statements (January 2013) |
| Joseph Schlenoff | Low | Stub | 2 | August 2011 | Orphaned articles (August 2011), Articles with too few wikilinks (November 2012) |
| Joseph Swan | Low | B | 2 | September 2011 | Articles with unsourced statements (February 2013, September 2011) |
| Journal of Microencapsulation | Low | Stub | 1 | January 2010 | Articles lacking reliable references (January 2010) |
| Joyce Jacobson Kaufman | Unknown | Start | 2 | November 2012 | BLP articles lacking sources (November 2012), Persondata templates without short description parameter |
| Juan de Dios Guevara | Low | Start | 2 | July 2010 | Wikipedia pages needing cleanup (July 2010), Articles needing cleanup (July 2010) |
| Julia Higgins | Unknown | Unassessed | 1 | June 2011 | Articles lacking in-text citations (June 2011) |
| Juliá–Colonna epoxidation | Low | C | 1 | December 2011 | Articles with links needing disambiguation (December 2011) |
| Julius Lothar Meyer | Mid | C | 1 | January 2009 | Articles with unsourced statements (January 2009) |
| Justus von Liebig | Top | Start | 2 | August 2012 | Articles with unsourced statements (August 2012, September 2012) |
| Jābir ibn Hayyān | Mid | B | 5 | May 2009 | Articles with unsourced statements (June 2010, May 2009), Wikipedia articles needing factual verification (June 2011), Articles with links needing disambiguation (November 2012), Persondata templates without short description parameter |
| K-mer | Unknown | Unassessed | 1 | May 2010 | Articles lacking sources (May 2010) |
| Karen Wetterhahn | Mid | Start | 1 | April 2013 | Accuracy disputes (April 2013) |
| Karlsruhe Congress | Mid | C | 1 | June 2010 | Articles with dead external links (June 2010) |
| Karl Albert Hasselbalch | Low | Stub | 1 | Persondata templates without short description parameter | |
| Karl Andreas Hofmann | Low | Stub | 1 | Persondata templates without short description parameter | |
| Karl Barry Sharpless | High | Start | 1 | April 2012 | Articles lacking in-text citations (April 2012) |
| Karl Ernst Claus | Low | C | 1 | Persondata templates without short description parameter | |
| Karl Friedrich Mohr | Low | Start | 1 | Persondata templates without short description parameter | |
| Karl Friedrich Plattner | Low | Stub | 1 | Persondata templates without short description parameter | |
| Karl Slotta | Unknown | Unassessed | 3 | February 2013 | Articles lacking in-text citations (February 2013), Articles with too few wikilinks (February 2013), Persondata templates without short description parameter |
| Karl Theophil Fries | Mid | Start | 1 | Persondata templates without short description parameter | |
| Karl von Auwers | Low | Stub | 1 | Persondata templates without short description parameter | |
| Karrick process | Low | Start | 1 | July 2009 | Articles with unsourced statements (July 2009) |
| Kasha's rule | Unknown | Unassessed | 1 | April 2009 | Articles with unsourced statements (April 2009) |
| Kathryn Uhrich | Low | Start | 1 | December 2010 | Articles with unsourced statements (December 2010) |
| Kauri-butanol value | Unknown | Unassessed | 1 | March 2012 | Articles needing additional references (March 2012) |
| Kazimierz Fajans | Low | C | 1 | Persondata templates without short description parameter | |
| Keith A. Wheeler | Unknown | Unassessed | 3 | November 2008 | Wikipedia articles with possible conflicts of interest (November 2008), Orphaned articles (February 2009), Autobiographical articles (September 2009) |
| Keith Fagnou | Low | C | 1 | Persondata templates without short description parameter | |
| Keith Hodgson | Low | Start | 3 | February 2013 | BLP articles lacking sources (February 2013), Articles with too few wikilinks (February 2013), Persondata templates without short description parameter |
| Keith J. Laidler | Low | Start | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Kenneth Breslauer | Low | Start | 2 | February 2009 | Orphaned articles (February 2009), Persondata templates without short description parameter |
| Ketazine process | Low | Stub | 1 | May 2007 | Articles lacking sources (May 2007) |
| Ketenimine | Mid | Stub | 2 | January 2011 | Orphaned articles (January 2011), Articles lacking sources (February 2011) |
| Ketolide | Low | Stub | 1 | June 2008 | Articles lacking reliable references (June 2008) |
| Ketone enolate | Unknown | Unassessed | 1 | January 2013 | Articles lacking sources (January 2013) |
| Key odorant | Low | Stub | 1 | September 2010 | Articles lacking sources (September 2010) |
| Khimera | Unknown | Unassessed | 1 | September 2009 | Articles needing additional references (September 2009) |
| Kim Janda | Low | Start | 1 | July 2009 | Wikipedia articles with possible conflicts of interest (July 2009) |
| Kinetic fractionation | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Kinetic Inhibitor | Low | Stub | 3 | August 2012 | Orphaned articles (April 2013), Wikipedia articles that are too technical (August 2012), All articles needing expert attention |
| Kintech Lab | Unknown | Unassessed | 2 | September 2009 | Articles with topics of unclear notability (September 2009), Articles needing additional references (September 2009) |
| Klaus Clusius | Low | C | 1 | Persondata templates without short description parameter | |
| Kläui ligand | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Konrad Seppelt | Low | Start | 1 | Persondata templates without short description parameter | |
| Korean Fiber Society | Unknown | Stub | 2 | January 2011 | Orphaned articles (January 2011), All articles needing expert attention |
| Kowalski ester homologation | Mid | Stub | 1 | September 2007 | Articles with unsourced statements (September 2007) |
| Krakatoa (explosive) | Low | Stub | 2 | October 2008 | Articles with dead external links (November 2010), Articles needing additional references (October 2008) |
| KRP (biochemistry) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Kurt Alder | High | Start | 1 | August 2009 | Articles with unsourced statements (August 2009) |
| Kurt Wüthrich | Mid | Start | 1 | February 2013 | BLP articles lacking sources (February 2013) |
| L. Gary Leal | Low | Start | 1 | Persondata templates without short description parameter | |
| L1210 cells | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Laboratory centrifuge | Low | C | 1 | February 2008 | Articles needing additional references (February 2008) |
| Laboratory glassware | Mid | C | 1 | February 2011 | Articles needing additional references (February 2011) |
| Laboratory tube | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Lactenin | Low | Stub | 2 | October 2010 | Orphaned articles (October 2010), Articles lacking sources (October 2010) |
| Lactone | Mid | C | 1 | January 2010 | Articles with unsourced statements (January 2010) |
| Ladderane | Low | Start | 1 | January 2011 | Wikipedia articles needing clarification (January 2011) |
| Laminin 111 | Unknown | Unassessed | 3 | November 2012 | Wikipedia introduction cleanup (November 2012), Orphaned articles (December 2012), Articles with too few wikilinks (March 2013) |
| Lanny D. Schmidt | Low | C | 1 | October 2010 | Articles with dead external links (October 2010) |
| Lanthanide trifluoromethanesulfonates | Mid | C | 2 | January 2008 | Articles with dead external links (April 2009), Articles with unsourced statements (January 2008) |
| Lanthanum strontium cobalt ferrite | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Larry E. Overman | Low | Start | 1 | Persondata templates without short description parameter | |
| Lars Onsager | High | C | 1 | March 2013 | Articles needing additional references (March 2013) |
| Lars Walløe | Low | Stub | 2 | October 2011 | Wikipedia pages needing cleanup (October 2011), Articles needing cleanup (October 2011) |
| Laser-induced incandescence | Unknown | Unassessed | 1 | January 2010 | Orphaned articles (January 2010) |
| Lateral motor column neuron | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Latex beads | Unknown | Stub | 1 | May 2009 | Orphaned articles (May 2009) |
| Lattice energy | High | Start | 2 | January 2013 | Wikipedia pages needing cleanup (January 2013), Articles needing cleanup (January 2013) |
| Laura L. Kiessling | Low | Stub | 1 | Persondata templates without short description parameter | |
| Lawrence H. Knox | Unknown | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Laws of science | High | Start | 1 | February 2008 | Articles needing additional references (February 2008) |
| Law of dilution | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Law of multiple proportions | Mid | Start | 1 | September 2011 | Articles needing additional references (September 2011) |
| Léon Lortie | Low | Stub | 1 | Persondata templates without short description parameter | |
| Lead–acid battery | Mid | C | 3 | February 2012 | Wikipedia pages needing cleanup (October 2012), Articles needing cleanup (October 2012), Articles needing additional references (February 2012) |
| Lead glass | Mid | B | 1 | September 2012 | Wikipedia articles needing factual verification (September 2012) |
| Lectka enantioselective beta-lactam synthesis | Low | Start | 4 | May 2010 | Wikipedia articles needing context (October 2010), Wikipedia introduction cleanup (October 2010), Orphaned articles (September 2010), Articles lacking sources (May 2010) |
| Lemont Kier | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Lemon battery | Unknown | Unassessed | 1 | March 2013 | Articles to be expanded (March 2013) |
| Leonard Francis Lindoy | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Leopold Gmelin | Low | Stub | 1 | Persondata templates without short description parameter | |
| Leopold Horner | Low | Stub | 1 | Persondata templates without short description parameter | |
| Leo Brewer | Low | Start | 2 | March 2013 | Articles needing additional references (March 2013), Persondata templates without short description parameter |
| Leo Paquette | Low | Stub | 2 | February 2013 | NPOV disputes (February 2013), Persondata templates without short description parameter |
| Leucoderivative | Unknown | Unassessed | 1 | September 2010 | Orphaned articles (September 2010) |
| Leuco dye | Unknown | Unassessed | 2 | December 2009 | Wikipedia articles needing clarification (May 2010), Articles lacking sources (December 2009) |
| Levomethamphetamine | Unknown | Stub | 1 | May 2009 | Articles with unsourced statements (May 2009) |
| Lev Aleksandrovich Chugaev | Low | Stub | 1 | Persondata templates without short description parameter | |
| Lewis C. Cantley | Low | C | 1 | Persondata templates without short description parameter | |
| Lewis Feuchtwanger | Low | Stub | 2 | April 2013 | Articles lacking sources (April 2013), Persondata templates without short description parameter |
| Lhasa (computing) | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Liesegang rings | Low | Start | 2 | November 2010 | Articles lacking in-text citations (November 2010), All articles needing expert attention |
| Ligand binding assays | Low | Stub | 1 | April 2013 | Articles to be merged (April 2013) |
| Ligand bond number | Low | Start | 2 | October 2012 | Wikipedia articles that are too technical (October 2012), All articles needing expert attention |
| Ligand cone angle | Low | B | 1 | January 2013 | Articles with unsourced statements (January 2013) |
| Ligand dependent pathway | Low | Stub | 2 | January 2012 | Articles with topics of unclear notability (January 2012), Articles lacking sources (January 2012) |
| Ligand isomerism | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Ligand K-edge | Unknown | Unassessed | 2 | September 2010 | Wikipedia articles needing context (September 2010), Wikipedia introduction cleanup (September 2010) |
| Light metal | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Lignan | Low | Start | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Limiting current | Low | Stub | 1 | December 2012 | Articles lacking in-text citations (December 2012) |
| Lindlar catalyst | Low | Start | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| Linear alpha olefin | Unknown | Unassessed | 1 | September 2011 | Articles needing additional references (September 2011) |
| Linear sweep voltammetry | Low | Stub | 1 | March 2011 | Articles needing additional references (March 2011) |
| Linus Pauling | Top | B | 2 | January 2009 | Articles with unsourced statements (April 2011, January 2009) |
| Lipid A | Mid | Start | 1 | March 2009 | Articles with unsourced statements (March 2009) |
| Lipophobicity | Unknown | Unassessed | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| Liposome | Mid | Start | 3 | January 2012 | Articles with unsourced statements (January 2012, July 2012), Articles with limited geographic scope (January 2012) |
| Liquefied petroleum gas | Mid | Start | 4 | July 2009 | Articles with dead external links (July 2009), Articles needing additional references (September 2009), Articles with unsourced statements (August 2009, June 2010) |
| Liquidus | Low | Start | 1 | August 2012 | Articles lacking sources (August 2012) |
| Liquid chromatography–mass spectrometry | Mid | Start | 1 | December 2008 | Articles with unsourced statements (December 2008) |
| Liquid crystal | Mid | GA | 1 | May 2012 | Articles needing additional references (May 2012) |
| List of alchemical substances | NA | List | 1 | August 2008 | Incomplete lists (August 2008) |
| List of antioxidants in food | Low | List | 4 | February 2010 | Articles with dead external links (May 2011, October 2010), Articles with unsourced statements (February 2010, October 2010) |
| List of benzo compounds | Unknown | Unassessed | 2 | January 2010 | Orphaned articles (January 2010), Articles lacking sources (January 2010) |
| List of chemistry journals | Mid | List | 3 | August 2008 | Articles containing potentially dated statements (2004), Articles that may contain original research (January 2011), Incomplete lists (August 2008) |
| List of chemistry mnemonics | Low | List | 3 | January 2012 | Wikipedia pages needing cleanup (January 2012), Articles needing cleanup (January 2012), Articles lacking reliable references (January 2012) |
| List of chemistry societies | Mid | List | 1 | July 2010 | Articles to be expanded (July 2010) |
| List of commonly available chemicals | Mid | List | 2 | June 2009 | Articles with unsourced statements (June 2009), All articles needing expert attention |
| List of compounds with carbon numbers 25-29 | Low | List | 1 | December 2009 | Articles lacking sources (December 2009) |
| List of compounds with carbon numbers 30-39 | Low | List | 1 | December 2009 | Articles lacking sources (December 2009) |
| List of compounds with carbon numbers 40-49 | Low | List | 1 | December 2009 | Articles lacking sources (December 2009) |
| List of compounds with carbon number 1 | Low | List | 1 | December 2009 | Articles lacking sources (December 2009) |
| List of compounds with carbon number 2 | Low | List | 1 | December 2009 | Articles lacking sources (December 2009) |
| List of DNA nanotechnology research groups | Unknown | Unassessed | 1 | October 2012 | Articles with dead external links (October 2012) |
| List of food additives | Mid | List | 2 | March 2010 | Wikipedia pages needing cleanup (March 2010), Articles needing cleanup (March 2010) |
| List of food additives, Codex Alimentarius | Mid | List | 1 | January 2010 | Articles with unsourced statements (January 2010) |
| List of IARC Group 1 carcinogens | Low | List | 2 | January 2011 | Wikipedia articles in need of updating (June 2012), Wikipedia references cleanup (January 2011) |
| List of IARC Group 2A carcinogens | Low | List | 1 | June 2012 | Wikipedia articles in need of updating (June 2012) |
| List of IARC Group 2B carcinogens | Low | List | 1 | June 2012 | Wikipedia articles in need of updating (June 2012) |
| List of important publications in chemistry | Low | List | 2 | July 2010 | Articles to be expanded (July 2010, June 2011) |
| List of inorganic compounds | High | List | 1 | August 2012 | Articles to be expanded (August 2012) |
| List of inorganic reactions | Unknown | Unassessed | 2 | September 2011 | Articles with topics of unclear notability (September 2011), Articles lacking sources (September 2011) |
| List of interstellar and circumstellar molecules | Mid | FL | 1 | September 2010 | Articles with dead external links (September 2010) |
| List of Jewish American chemists | Low | List | 2 | January 2007 | Orphaned articles (January 2011), Articles needing additional references (January 2007) |
| List of molecular graphics systems | Unknown | Unassessed | 8 | September 2009 | Accuracy disputes (August 2010, March 2011, May 2010, September 2009), Wikipedia pages needing cleanup (September 2009), Articles needing cleanup (September 2009), Articles lacking reliable references (September 2009), Articles with unsourced statements (September 2009) |
| List of Nobel laureates in Chemistry | High | FL | 1 | February 2013 | Articles to be expanded (February 2013) |
| List of Russian chemists | Mid | List | 1 | February 2011 | Incomplete lists (February 2011) |
| List of Schedule 1 substances (CWC) | Low | List | 1 | January 2013 | Articles lacking in-text citations (January 2013) |
| List of Schedule 3 substances (CWC) | Low | List | 1 | January 2013 | Articles lacking in-text citations (January 2013) |
| List of scientific constants named after people | Low | List | 1 | May 2012 | Incomplete lists (May 2012) |
| List of standard Gibbs free energies of formation | Mid | List | 1 | December 2011 | Articles needing additional references (December 2011) |
| List of unsolved problems in chemistry | Low | List | 2 | November 2011 | Accuracy disputes (November 2011), All articles needing expert attention |
| List of UN numbers 3501 to 3600 | Low | List | 1 | June 2012 | Orphaned articles (June 2012) |
| Lithium–sulfur battery | High | B | 1 | April 2013 | Wikipedia articles needing clarification (April 2013) |
| Lithium iron phosphate battery | Mid | Start | 5 | April 2010 | Wikipedia articles needing style editing (November 2012), Articles with unsourced statements (April 2010, April 2013, December 2010, February 2012) |
| Lithium polymer battery | Low | C | 9 | May 2008 | Wikipedia articles needing clarification (March 2011), Articles needing additional references (December 2010, March 2011), Articles with unsourced statements (August 2012, June 2009, March 2009, May 2008, September 2009), Wikipedia articles in need of updating (December 2010) |
| Lithium soap | Mid | Stub | 2 | January 2013 | Wikipedia articles needing clarification (January 2013), Articles with unsourced statements (January 2013) |
| Lithopone | Low | Stub | 1 | March 2012 | Articles with unsourced statements (March 2012) |
| Lloyd Noel Ferguson | Low | Start | 1 | Persondata templates without short description parameter | |
| Local oxidation nanolithography | Low | C | 2 | July 2009 | Wikipedia articles that are too technical (July 2009), All articles needing expert attention |
| Locus of enterocyte effacement | Low | Stub | 1 | October 2008 | Orphaned articles (October 2008) |
| Lodewijk van den Berg | Low | GA | 1 | Articles containing potentially dated statements (2005) | |
| Loker Hydrocarbon Research Institute | Unknown | Unassessed | 1 | All articles needing coordinates | |
| Lotte Pusch | Low | Stub | 1 | Persondata templates without short description parameter | |
| Lotus effect | Unknown | Unassessed | 3 | June 2011 | Wikipedia articles needing clarification (September 2011), Articles with unsourced statements (July 2011, June 2011) |
| Louise Hammarström | Unknown | Stub | 3 | November 2012 | Articles lacking in-text citations (November 2012), Articles needing additional references (November 2012), Persondata templates without short description parameter |
| Louis Le Chatelier | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Low-molecular-weight chromium-binding substance | Low | Stub | 1 | April 2012 | Orphaned articles (April 2012) |
| Lubricant | Low | Start | 2 | September 2010 | Articles needing additional references (September 2010), Articles with unsourced statements (December 2012) |
| Lubrication | Low | Start | 1 | March 2013 | Articles to be expanded (March 2013) |
| Ludwig Knorr | Low | C | 1 | Persondata templates without short description parameter | |
| Ludwig Mond | Mid | B | 1 | Persondata templates without short description parameter | |
| Lutzner cells | Low | Stub | 2 | November 2009 | Orphaned articles (February 2013), Articles lacking sources (November 2009) |
| Lycasin | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Lycopodium powder | Low | Stub | 2 | September 2011 | Articles with unsourced statements (June 2012, September 2011) |
| Lyotropic | Unknown | Unassessed | 1 | July 2009 | Articles lacking sources (July 2009) |
| M. Vijayan | Low | Start | 1 | Persondata templates without short description parameter | |
| Macrocycle | Mid | C | 1 | January 2010 | Articles with unsourced statements (January 2010) |
| Macrolide | Mid | Start | 2 | October 2009 | Articles with unsourced statements (October 2009, September 2010) |
| MacroModel | Unknown | Unassessed | 2 | May 2009 | Wikipedia articles needing clarification (May 2009), All articles needing expert attention |
| Macromolecule | High | Start | 1 | August 2012 | Articles with dead external links (August 2012) |
| MAFA | Low | Stub | 1 | May 2008 | Articles with unsourced statements (May 2008) |
| Magnetic quantum number | Mid | Start | 1 | August 2009 | Articles lacking sources (August 2009) |
| Magnetic stirrer | Mid | Start | 3 | September 2010 | Wikipedia articles needing clarification (July 2012), Articles with dead external links (March 2013), Articles needing additional references (September 2010) |
| Malcolm Dole | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Mallory metal | Low | Stub | 1 | April 2010 | Orphaned articles (April 2010) |
| Manfred Eigen | Low | C | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| Mao Gao-wen | Low | Stub | 2 | August 2009 | BLP articles lacking sources (August 2009), Persondata templates without short description parameter |
| MAP kinase kinase kinase kinase | Low | Stub | 2 | May 2011 | Orphaned articles (February 2013), Incomplete lists (May 2011) |
| Marcetta Y. Darensbourg | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Marc Julia | Low | Start | 1 | Persondata templates without short description parameter | |
| Marc Tiffeneau | Mid | Stub | 1 | January 2013 | Articles lacking in-text citations (January 2013) |
| Maria Bakunin | Low | Stub | 3 | November 2009 | Wikipedia pages needing cleanup (November 2009), Articles needing cleanup (November 2009), Persondata templates without short description parameter |
| Mark Eberhart | Low | Stub | 3 | January 2011 | BLP articles lacking sources (February 2011), Orphaned articles (January 2011), Persondata templates without short description parameter |
| Mark Ratner | Low | Start | 2 | February 2013 | BLP articles lacking sources (February 2013), Persondata templates without short description parameter |
| Marschalk reaction | Unknown | Unassessed | 1 | January 2011 | Orphaned articles (January 2011) |
| Martin Heinrich Klaproth | High | Start | 1 | January 2013 | Articles needing additional references (January 2013) |
| Martin Karplus | Mid | Start | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Martin Lowry | Mid | Start | 1 | Persondata templates without short description parameter | |
| Mary Peters Fieser | Low | Start | 2 | November 2012 | Articles lacking in-text citations (November 2012), Persondata templates without short description parameter |
| Masataka Ogawa | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Mass fraction (chemistry) | Mid | Stub | 1 | May 2013 | Wikipedia articles needing copy edit (May 2013) |
| Materials science | High | C | 3 | April 2009 | Articles needing cleanup (June 2010), Articles lacking in-text citations (April 2009), Wikipedia list cleanup (June 2010) |
| Mathew Carey Lea | Low | Stub | 1 | July 2009 | Articles with unsourced statements (July 2009) |
| Matrix isolation | Mid | Start | 1 | December 2010 | Articles lacking in-text citations (December 2010) |
| Mats Hillert | Low | Stub | 1 | Persondata templates without short description parameter | |
| Matthew Linford | Low | Stub | 9 | April 2012 | Wikipedia external links cleanup (December 2012), Articles lacking in-text citations (April 2012), NPOV disputes (April 2012), Orphaned articles (May 2012), Articles with peacock terms (April 2012), Articles needing additional references (April 2012), Wikipedia spam cleanup (December 2012), Wikipedia articles needing style editing (April 2012), Persondata templates without short description parameter |
| Maud Menten | Unknown | Start | 1 | November 2012 | Articles needing additional references (November 2012) |
| Maurice Lister | Low | Start | 1 | Persondata templates without short description parameter | |
| Maurocalcine | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Maxine Singer | Unknown | Start | 1 | April 2011 | Articles lacking in-text citations (April 2011) |
| Max Bodenstein | Mid | C | 2 | February 2013 | Articles needing additional references (February 2013), Persondata templates without short description parameter |
| Max Delbrück (chemist) | Low | Stub | 1 | Persondata templates without short description parameter | |
| Max Perutz | High | C | 2 | September 2010 | Articles with dead external links (September 2010), Articles with unsourced statements (October 2011) |
| Máté Hidvégi | Low | Start | 2 | September 2009 | Articles with unsourced statements (September 2009), Persondata templates without short description parameter |
| Measurement uncertainty | Mid | Start | 1 | February 2013 | Articles to be split (February 2013) |
| Mechanostereochemistry | Low | Stub | 2 | September 2008 | Orphaned articles (February 2009), Articles needing additional references (September 2008) |
| Medicinal chemistry | High | Start | 1 | June 2011 | Articles with unsourced statements (June 2011) |
| Medium-chain triglyceride | Unknown | Unassessed | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| Meiomitosis | Low | Stub | 1 | September 2010 | Orphaned articles (September 2010) |
| Melanotroph | Low | Stub | 1 | February 2007 | Articles lacking sources (February 2007) |
| Melchior Cibinensis | Low | Start | 1 | Persondata templates without short description parameter | |
| Melting | Mid | Start | 1 | April 2008 | Articles with unsourced statements (April 2008) |
| Melting point | High | B | 1 | June 2011 | Articles with links needing disambiguation (June 2011) |
| Membrane ruffling | Low | Stub | 2 | October 2009 | Wikipedia articles needing context (October 2009), Wikipedia introduction cleanup (October 2009) |
| Mendeleev's predicted elements | High | C | 2 | February 2007 | Wikipedia introduction cleanup (March 2013), Articles with unsourced statements (February 2007) |
| Mercury coulometer | Low | Stub | 1 | October 2008 | Articles needing additional references (October 2008) |
| Merozygote | Low | Stub | 1 | September 2008 | Articles lacking sources (September 2008) |
| Mesoporous organosilica | Unknown | Unassessed | 1 | March 2012 | Orphaned articles (March 2012) |
| Metal | Top | C | 3 | March 2010 | Wikipedia articles that are too technical (December 2012), Articles with unsourced statements (March 2010), All articles needing expert attention |
| Metalation | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Metal–air electrochemical cell | Unknown | Unassessed | 1 | April 2013 | Articles with dead external links (April 2013) |
| Metallate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Metallic bond | High | B | 3 | October 2009 | Articles needing additional references (October 2009), Articles with unsourced statements (March 2013), Articles with specifically marked weasel-worded phrases (March 2013) |
| Metallizing | Low | Stub | 1 | March 2009 | Articles lacking sources (March 2009) |
| Metallofullerene | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Metallurgical assay | Mid | Start | 1 | May 2009 | Articles needing additional references (May 2009) |
| Metalorganics | Low | Stub | 2 | January 2012 | Articles with unsourced statements (January 2012), All articles needing expert attention |
| Metalorganic vapour phase epitaxy | Low | Stub | 1 | April 2012 | Articles to be merged (April 2012) |
| Metal carbonyl | Mid | C | 1 | May 2012 | Articles with unsourced statements (May 2012) |
| Metal chalcogenide | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Metal L-edge | Unknown | Unassessed | 2 | October 2012 | Articles needing sections (October 2012), Articles with too few wikilinks (October 2012) |
| Metaoxyacids | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Methane clathrate | Mid | C | 3 | September 2010 | Articles with unsourced statements (October 2011, September 2010), Vague or ambiguous time (March 2013) |
| Methylamide | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Methylation induced premeiotically | Low | Stub | 1 | August 2011 | Articles needing additional references (August 2011) |
| Methylene group | Low | Stub | 1 | March 2013 | Articles lacking sources (March 2013) |
| Methylglutamate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Methylthioacetaldoxime | Unknown | Stub | 5 | January 2013 | Wikipedia articles needing context (January 2013), Wikipedia introduction cleanup (January 2013), Articles lacking sources (January 2013), Wikipedia articles needing reorganization (January 2013), All articles needing expert attention |
| Methylthiomethyl ether | Low | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Methyl group | High | Start | 1 | January 2013 | Articles to be merged (January 2013) |
| Mexal 1500 | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Micellar liquid chromatography | Unknown | Unassessed | 1 | September 2008 | Wikipedia articles needing style editing (September 2008) |
| Michael B. Hall | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Michael E. Jung | Low | Stub | 1 | Persondata templates without short description parameter | |
| Michael F. Lappert | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Michael K. Denk | Low | Stub | 1 | Persondata templates without short description parameter | |
| Michael Kasha | Low | Stub | 2 | February 2013 | BLP articles lacking sources (February 2013), Persondata templates without short description parameter |
| Michael Marletta | Low | Stub | 1 | Persondata templates without short description parameter | |
| Michael Perrin | Low | Start | 1 | Persondata templates without short description parameter | |
| Michel Che | Low | Stub | 2 | September 2011 | Articles with unsourced statements (September 2011), Persondata templates without short description parameter |
| Micro-compounding | Unknown | Unassessed | 3 | July 2012 | Orphaned articles (July 2012), Articles needing additional references (August 2012), Articles needing sections (November 2012) |
| Microanalysis | Unknown | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Microbial arene oxidation | Low | C | 1 | April 2013 | Articles with too few wikilinks (April 2013) |
| Microstrip detector | Unknown | Unassessed | 1 | August 2008 | Articles lacking sources (August 2008) |
| Microviscosity | Unknown | Unassessed | 1 | September 2010 | Articles needing additional references (September 2010) |
| Milton C. Whitaker | Unknown | Unassessed | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| Minnesota Functionals | Low | Start | 1 | All articles needing expert attention | |
| Mischmetal | Unknown | Unassessed | 2 | April 2012 | Articles containing potentially dated statements (2007), Articles lacking in-text citations (April 2012) |
| Miscibility | Mid | Start | 1 | August 2010 | Articles lacking sources (August 2010) |
| Missense mRNA | Low | Stub | 2 | November 2007 | Orphaned articles (February 2009), Articles lacking sources (November 2007) |
| Mixed oxide | Mid | Stub | 2 | June 2009 | Wikipedia articles needing clarification (June 2009), Articles with unsourced statements (June 2009) |
| Mixed potential theory | Low | Stub | 1 | October 2008 | Articles needing additional references (October 2008) |
| Mixture | Mid | Start | 1 | December 2012 | Articles needing additional references (December 2012) |
| MKM steel | Low | Stub | 1 | August 2009 | Articles lacking sources (August 2009) |
| Modified starch | Low | Start | 3 | May 2010 | Articles with disputed statements (January 2011), Articles needing additional references (May 2010), Articles with unsourced statements (January 2011) |
| Molar mass | High | Start | 1 | December 2008 | Articles needing additional references (December 2008) |
| MOLCAS | Low | Start | 3 | November 2012 | Accuracy disputes (November 2012), Articles with topics of unclear notability (November 2012), Articles lacking reliable references (November 2012) |
| Molden | Unknown | Stub | 2 | April 2012 | Articles with topics of unclear notability (April 2012), Articles lacking reliable references (April 2012) |
| Molecular autoionization | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Molecular electronic transducers | Low | Start | 2 | March 2009 | Orphaned articles (January 2011), Articles needing additional references (March 2009) |
| Molecular geometry | High | Start | 2 | January 2011 | Wikipedia pages needing cleanup (January 2011), Articles needing cleanup (January 2011) |
| Molecular graphics | Mid | B | 1 | June 2009 | Articles needing additional references (June 2009) |
| Molecular modeling on GPUs | Mid | Start | 1 | December 2011 | Articles with topics of unclear notability (December 2011) |
| Molecular modification | Unknown | Unassessed | 2 | November 2006 | Orphaned articles (February 2009), Articles lacking sources (November 2006) |
| Molecular orbital theory | Mid | C | 1 | July 2012 | Articles needing additional references (July 2012) |
| Molecular probe | Low | Stub | 3 | October 2009 | Wikipedia articles needing context (October 2009), Articles to be expanded (July 2010), Wikipedia introduction cleanup (October 2009) |
| Molecular promiscuity | Low | Stub | 2 | August 2007 | Orphaned articles (February 2009), Articles lacking sources (August 2007) |
| Molecular property | Low | Stub | 1 | April 2007 | Articles needing additional references (April 2007) |
| Molecular spacer | Low | Stub | 1 | January 2009 | Articles lacking sources (January 2009) |
| Molecular tweezers | Low | C | 1 | July 2011 | Articles with unsourced statements (July 2011) |
| Molecule | Top | C | 2 | September 2010 | Articles with unsourced statements (December 2012, September 2010) |
| Molekel | Unknown | Stub | 2 | April 2012 | Articles with topics of unclear notability (April 2012), Articles lacking reliable references (April 2012) |
| Mole (unit) | Top | B | 2 | June 2011 | Articles containing potentially dated statements (2011), Articles with unsourced statements (June 2011) |
| MOLPRO | Low | Stub | 2 | April 2012 | Articles with topics of unclear notability (April 2012), Articles lacking reliable references (April 2012) |
| Monatomic gas | Low | Stub | 1 | May 2012 | Articles needing additional references (May 2012) |
| Monatomic ion | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Mond process | Mid | Start | 1 | May 2012 | Articles with dead external links (May 2012) |
| Monoglyceride | Unknown | Unassessed | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Monolignol | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Monolithic HPLC column | Unknown | Unassessed | 2 | January 2011 | Wikipedia articles needing style editing (January 2011), Articles with links needing disambiguation (July 2012) |
| Monosaccharide | High | Start | 1 | October 2010 | Articles needing additional references (October 2010) |
| Monoxide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Mordant | Mid | Stub | 1 | All articles needing expert attention | |
| Morten P. Meldal | Low | Start | 4 | March 2009 | Articles with dead external links (November 2012), Articles with topics of unclear notability (March 2009), Articles that may be too long (March 2012), Persondata templates without short description parameter |
| Moses Gomberg | Mid | C | 1 | Persondata templates without short description parameter | |
| MTBE controversy | Mid | Start | 3 | April 2012 | Articles needing cleanup (April 2012), Articles with dead external links (April 2012), Articles needing link rot cleanup (April 2012) |
| Multicolumn countercurrent solvent gradient purification | Mid | Start | 1 | September 2008 | Articles needing additional references (September 2008) |
| Multifunctional peptides | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), Articles lacking sources (December 2009) |
| Mung bean endonuclease | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Muonium | Low | Stub | 1 | June 2010 | Articles needing additional references (June 2010) |
| Mushet steel | Low | C | 1 | December 2010 | Wikipedia articles needing clarification (December 2010) |
| Mustard oil | Low | Start | 2 | December 2008 | Articles with unsourced statements (December 2008, July 2011) |
| Myokine | High | Stub | 2 | January 2012 | Orphaned articles (January 2012), Articles lacking sources (January 2012) |
| N-Acylethanolamine | Low | Stub | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| N-Oxoammonium salt | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| N-philes | Unknown | Unassessed | 1 | April 2012 | Orphaned articles (April 2012) |
| Nanoelectrochemistry | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Nanoparticle | High | C | 1 | June 2010 | Articles with unsourced statements (June 2010) |
| Nanoporous | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| NanoScale Corporation | Unknown | Unassessed | 4 | May 2009 | Wikipedia pages needing cleanup (May 2009), Articles needing cleanup (May 2009), Orphaned articles (March 2010), Articles with links needing disambiguation (February 2012) |
| Nanotechnology | High | B | 2 | August 2008 | Articles with dead external links (June 2012), Articles with unsourced statements (August 2008) |
| Nano spray dryer | Unknown | Unassessed | 1 | April 2013 | Articles lacking sources (April 2013) |
| Narrow range ethoxylate | Mid | Start | 3 | July 2009 | Wikipedia articles needing context (July 2009), Wikipedia introduction cleanup (July 2009), All articles needing expert attention |
| Nascent hydrogen | Low | Start | 1 | April 2008 | Articles with unsourced statements (April 2008) |
| NAS Award for Chemistry in Service to Society | Unknown | Unassessed | 1 | March 2013 | Articles lacking in-text citations (March 2013) |
| NAS Award in Chemical Sciences | Unknown | Unassessed | 1 | March 2013 | Articles lacking in-text citations (March 2013) |
| Nathan Lewis | Low | Start | 2 | March 2013 | Articles lacking in-text citations (March 2013), Persondata templates without short description parameter |
| Natural material | High | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Natural oil polyols | Low | Start | 1 | October 2010 | Articles with dead external links (October 2010) |
| Natural product | High | B | 2 | January 2009 | Accuracy disputes (March 2011), Articles needing additional references (January 2009) |
| Natural Product Updates | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Nature | Top | GA | 3 | February 2010 | Articles with dead external links (May 2011), Articles with unsourced statements (April 2010, February 2010) |
| NBI Knowledgebase | Unknown | Stub | 1 | November 2012 | Articles with too few wikilinks (November 2012) |
| NdeI | Low | Stub | 1 | May 2009 | Articles with topics of unclear notability (May 2009) |
| NDPCP | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Neal Amundson | Low | Stub | 5 | November 2010 | Wikipedia pages needing cleanup (November 2010), Articles needing cleanup (November 2010), Articles needing additional references (November 2010), Articles with unsourced statements (November 2010), Persondata templates without short description parameter |
| Negative hyperconjugation | Low | Stub | 2 | August 2012 | Articles needing cleanup (August 2012), Articles needing link rot cleanup (August 2012) |
| Neil Bartlett (chemist) | Mid | Start | 1 | February 2013 | Articles needing additional references (February 2013) |
| Neonicotinoid | Low | C | 1 | August 2011 | Articles with dead external links (August 2011) |
| Nephelauxetic effect | Mid | Stub | 4 | December 2010 | Articles lacking in-text citations (December 2010), Articles needing additional references (December 2010), Wikipedia articles that are too technical (March 2013), All articles needing expert attention |
| Nesprin | Low | Stub | 1 | September 2009 | Articles with unsourced statements (September 2009) |
| Neuromuscular-blocking drug | Unknown | Unassessed | 1 | March 2010 | Articles with unsourced statements (March 2010) |
| Neutralization (chemistry) | Mid | Start | 1 | Articles needing more detailed references | |
| Neutral fat | Low | Stub | 1 | November 2010 | Orphaned articles (November 2010) |
| Neutronium | Low | Start | 5 | August 2011 | Wikipedia articles needing clarification (April 2013), Articles that may contain original research (February 2013), Articles lacking reliable references (February 2013), Articles with unsourced statements (August 2011), Articles with specifically marked weasel-worded phrases (April 2013) |
| New car smell | Low | Start | 2 | September 2011 | Articles with unsourced statements (February 2012, September 2011) |
| Nickel–metal hydride battery | Low | C | 9 | December 2009 | Wikipedia articles needing clarification (March 2012), Articles with dead external links (November 2010), Articles with unsourced statements (April 2012, December 2009, February 2012, June 2011, March 2013, November 2011), Articles with specifically marked weasel-worded phrases (March 2013) |
| Nicolas Flamel | Low | Start | 1 | Persondata templates without short description parameter | |
| Nikolai Menshutkin | Low | C | 1 | Persondata templates without short description parameter | |
| Nikolai Semenovich Kurnakov | Low | Start | 1 | Persondata templates without short description parameter | |
| Nikolay Beketov | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Nikolay Semyonov | High | Start | 2 | October 2011 | Wikipedia articles needing clarification (October 2011), Persondata templates without short description parameter |
| Nina Andreyeva | Low | Stub | 2 | November 2012 | BLP articles lacking sources (November 2012), Persondata templates without short description parameter |
| Nina Fedoroff | Low | Start | 3 | October 2010 | BLP articles lacking sources (October 2011), Articles with dead external links (October 2010), Persondata templates without short description parameter |
| Niosome | Unknown | Stub | 1 | August 2010 | Wikipedia articles needing style editing (August 2010) |
| Nitramex and Nitramon Explosives | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Nitrate | High | Start | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| Nitrile | Mid | C | 1 | May 2009 | Articles with dead external links (May 2009) |
| Nitrile rubber | Low | Start | 3 | March 2008 | Articles needing additional references (March 2008), Articles with unsourced statements (February 2013, September 2010) |
| Nitrite | Mid | Start | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| Nitrosamine | Mid | Start | 3 | September 2010 | Articles with unsourced statements (April 2011, March 2013, September 2010) |
| Nitro compound | High | Start | 1 | March 2009 | Articles with unsourced statements (March 2009) |
| Nitryl | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| NMR spectra database | Unknown | Unassessed | 3 | March 2012 | Articles that may contain original research (March 2012), Articles lacking sources (March 2012), Vague or ambiguous time (March 2012) |
| Nobel Prize in Chemistry | High | B | 2 | May 2010 | Articles with dead external links (October 2010), Articles with unsourced statements (May 2010) |
| Noble gas compound | Mid | C | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Noel L. Owen | Low | Stub | 2 | January 2010 | Articles with topics of unclear notability (January 2010), Persondata templates without short description parameter |
| Nomenclature of Inorganic Chemistry | Mid | Stub | 1 | March 2012 | Articles to be merged (March 2012) |
| Non-bonding orbital | Mid | Start | 2 | January 2008 | Articles needing additional references (January 2008), All articles needing expert attention |
| Non-classical ion | Mid | C | 1 | July 2007 | Articles with unsourced statements (July 2007) |
| Non-coordinating anion | High | Start | 1 | July 2012 | Articles with unsourced statements (July 2012) |
| Non-faradaic electrochemical modification of catalytic activity | Low | Stub | 7 | October 2008 | Wikipedia articles needing clarification (October 2008), Wikipedia articles needing context (October 2008), Wikipedia introduction cleanup (October 2008), Orphaned articles (October 2008), Articles needing additional references (October 2008), Articles with too few wikilinks (October 2012), All articles needing expert attention |
| Nonthermal surface reaction | Low | Stub | 1 | September 2008 | Orphaned articles (September 2008) |
| Norbert Bischofberger | Mid | Start | 1 | Persondata templates without short description parameter | |
| Norman Allinger | Low | Stub | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Norman Edson | Unknown | Start | 2 | November 2012 | Orphaned articles (November 2012), Persondata templates without short description parameter |
| Novichok agent | Unknown | Unassessed | 2 | November 2007 | Wikipedia pages needing cleanup (November 2007), Articles needing cleanup (November 2007) |
| Noyori asymmetric hydrogenation | Mid | Start | 1 | February 2012 | Articles with links needing disambiguation (February 2012) |
| Nuclear fuel | Unknown | Unassessed | 5 | January 2010 | Articles with dead external links (June 2012), Articles needing additional references (August 2010), Articles with unsourced statements (December 2012, January 2010), Articles with specifically marked weasel-worded phrases (May 2012) |
| Nuclear isomer | Mid | C | 2 | August 2009 | Articles with unsourced statements (August 2009, December 2010) |
| Nuclear magnetic resonance spectroscopy | High | B | 2 | July 2010 | Articles containing potentially dated statements (2003), Articles with unsourced statements (July 2010) |
| Nuclear transmutation | Low | C | 2 | March 2013 | Wikipedia articles that are too technical (March 2013), All articles needing expert attention |
| Nucleation | Mid | C | 1 | March 2009 | Articles with unsourced statements (March 2009) |
| Nucleobase cation symporter-1 | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Nucleotide universal IDentifier | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Nujol | Low | Stub | 2 | December 2009 | Articles to be merged (April 2011), Articles lacking sources (December 2009) |
| Nullomers | Low | Stub | 3 | October 2012 | Orphaned articles (October 2012), Articles needing additional references (October 2012), All articles needing expert attention |
| NUN buffer | Low | Stub | 1 | August 2011 | Articles needing additional references (August 2011) |
| Obligate activator | Unknown | Stub | 1 | February 2012 | Articles needing additional references (February 2012) |
| Ocean acidification | Low | C | 4 | June 2011 | Articles to be merged (June 2012), Wikipedia articles that are too technical (June 2011), Articles with unsourced statements (February 2012), All articles needing expert attention |
| Ocean chemistry | Low | C | 1 | March 2012 | Articles to be merged (March 2012) |
| Octafluoride | Unknown | Stub | 2 | October 2012 | Wikipedia articles that are too technical (October 2012), All articles needing expert attention |
| Octatomic element | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Odd Hassel | High | Start | 1 | Persondata templates without short description parameter | |
| Odor | Unknown | Unassessed | 5 | July 2010 | Wikipedia articles needing clarification (June 2011), Articles needing additional references (February 2012), Articles with unsourced statements (July 2010, November 2010), Articles with specifically marked weasel-worded phrases (April 2012) |
| Oil | Mid | Start | 1 | March 2013 | Articles with links needing disambiguation (March 2013) |
| Oil paint | Unknown | Unassessed | 1 | December 2012 | Wikipedia articles needing clarification (December 2012) |
| OKFOL | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Old Nassau reaction | Low | Stub | 1 | December 2008 | Articles lacking sources (December 2008) |
| Ole Lamm | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Oligomer | Mid | Stub | 2 | July 2010 | Articles with unsourced statements (April 2012, July 2010) |
| Oligonucleotide synthesis | Mid | GA | 1 | April 2009 | Articles with unsourced statements (April 2009) |
| Oliver H. Lowry | Low | Start | 1 | Persondata templates without short description parameter | |
| OLI Analyzer | Low | Stub | 2 | April 2009 | Articles with topics of unclear notability (April 2009), Orphaned articles (January 2011) |
| Olke C. Uhlenbeck | Low | Stub | 2 | April 2011 | Articles with unsourced statements (April 2011), Wikipedia articles needing factual verification (April 2011) |
| Omega-7 fatty acid | Unknown | Unassessed | 1 | April 2012 | Articles with unsourced statements (April 2012) |
| Omega-atracotoxin | Low | Stub | 1 | June 2011 | Orphaned articles (June 2011) |
| One-compartment kinetics | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), Articles lacking sources (December 2009) |
| Open shell | High | Start | 2 | November 2010 | Wikipedia pages needing cleanup (November 2010), Articles needing cleanup (November 2010) |
| Oppenauer oxidation | Mid | Stub | 1 | February 2012 | Articles with links needing disambiguation (February 2012) |
| Optical brightener | Mid | Start | 1 | August 2010 | Articles needing additional references (August 2010) |
| Optical contact bonding | Unknown | Unassessed | 1 | December 2009 | Articles to be expanded (December 2009) |
| Organic acid | Mid | C | 3 | March 2008 | Articles needing additional references (April 2009), Articles with unsourced statements (February 2013, March 2008) |
| Organic base | Mid | Start | 2 | April 2008 | Articles lacking sources (April 2009), Articles with unsourced statements (April 2008) |
| Organic chemistry | Top | B | 1 | February 2012 | Articles with unsourced statements (February 2012) |
| Organic compound | Top | Start | 2 | November 2009 | Articles to be expanded (April 2012), Articles with unsourced statements (November 2009) |
| Organic molecular tracers | Unknown | Unassessed | 5 | December 2009 | Wikipedia articles needing context (December 2009), Wikipedia introduction cleanup (December 2009), Orphaned articles (April 2010), Wikipedia articles that are too technical (December 2009), All articles needing expert attention |
| Organic peroxide | Mid | C | 1 | July 2011 | Articles with dead external links (July 2011) |
| Organic Reactions | Mid | Start | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| Organoarsenic chemistry | High | C | 1 | December 2008 | Articles with unsourced statements (December 2008) |
| Organoboron chemistry | Mid | B | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Organochloride | High | C | 1 | Articles containing potentially dated statements (2004) | |
| Organoclay | Low | Stub | 2 | February 2007 | Orphaned articles (February 2009), Articles lacking sources (February 2007) |
| Organofluorine chemistry | Mid | B | 1 | Articles containing potentially dated statements (2008) | |
| Organolanthanide chemistry | Unknown | Unassessed | 1 | March 2011 | Articles lacking sources (March 2011) |
| Organometallic chemistry | Top | Start | 1 | January 2012 | Articles with unsourced statements (January 2012) |
| Organophosphate | High | C | 1 | October 2012 | Articles with dead external links (October 2012) |
| Organostannane addition | Mid | C | 2 | June 2010 | Wikipedia articles needing context (June 2010), Wikipedia introduction cleanup (June 2010) |
| Organothiophosphate | Low | Stub | 1 | April 2012 | Articles lacking sources (April 2012) |
| Orgel diagram | Unknown | Unassessed | 1 | December 2010 | Articles needing additional references (December 2010) |
| Orthoacetic acid | Low | Stub | 1 | May 2011 | Orphaned articles (May 2011) |
| Oskar Baudisch | Low | Start | 1 | Persondata templates without short description parameter | |
| Oskar Piloty | Low | Stub | 1 | Persondata templates without short description parameter | |
| Osmotic dehydration | Unknown | Stub | 5 | June 2009 | Wikipedia pages needing cleanup (June 2009), Articles needing cleanup (June 2009), Orphaned articles (December 2010), Articles with too few wikilinks (October 2012), All articles needing expert attention |
| OTG (n-octyl beta-D-thioglucopyranoside) | Low | Stub | 1 | December 2012 | Orphaned articles (December 2012) |
| Otto Diels | High | Stub | 1 | Persondata templates without short description parameter | |
| Otto Dimroth | Low | Stub | 1 | Persondata templates without short description parameter | |
| Otto Folin | Mid | Start | 2 | February 2013 | Articles needing additional references (February 2013), Persondata templates without short description parameter |
| Otto Hahn | High | B | 1 | January 2013 | Articles with unsourced statements (January 2013) |
| Otto Lehmann (physicist) | Mid | Start | 1 | Persondata templates without short description parameter | |
| Otto Liebermann | Low | C | 3 | November 2008 | Orphaned articles (February 2009), Articles lacking sources (November 2008), Persondata templates without short description parameter |
| Otto Redlich | Low | Start | 1 | Persondata templates without short description parameter | |
| Otto Ruff | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Outline of physical science | Low | Start | 1 | December 2012 | Articles with unsourced statements (December 2012) |
| Overlayer | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), Articles lacking sources (December 2009) |
| Oxalate | Mid | Start | 4 | September 2009 | Wikipedia articles needing clarification (September 2012), Articles with disputed statements (September 2009), Articles with unsourced statements (January 2010), Articles with links needing disambiguation (March 2013) |
| Oxaprostaglandin | Low | Start | 1 | April 2013 | Orphaned articles (April 2013) |
| Oxidation of primary alcohols to carboxylic acids | Mid | Start | 2 | May 2008 | Articles to be expanded (May 2008, November 2010) |
| Oxidation of secondary alcohols to ketones | High | Start | 1 | May 2008 | Articles to be expanded (May 2008) |
| Oxidation with chromium(VI)-amine complexes | Mid | C | 2 | June 2011 | Wikipedia articles needing clarification (June 2011), Orphaned articles (December 2011) |
| Oxidative decarboxylation | Mid | Stub | 2 | November 2006 | Articles lacking sources (November 2006), Articles with unsourced statements (January 2012) |
| Oxidizing acid | Low | Stub | 1 | May 2010 | Articles needing additional references (May 2010) |
| Oxidizing agent | Top | Start | 1 | December 2012 | Articles needing additional references (December 2012) |
| Oxime | Mid | C | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| Oxonium ion | Mid | Start | 1 | July 2011 | Articles lacking in-text citations (July 2011) |
| Oxon (chemical) | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Oxycation | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Oxyhydrogen | Low | C | 1 | June 2012 | Articles with unsourced statements (June 2012) |
| Oxytalan | Low | Stub | 1 | October 2009 | Articles needing additional references (October 2009) |
| P97 | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Paint | Low | Start | 3 | June 2008 | Articles needing additional references (June 2008, November 2008), Articles with unsourced statements (August 2011) |
| Paint stripper | Low | Start | 1 | April 2013 | Articles with unsourced statements (April 2013) |
| Paint thinner | Low | Stub | 1 | July 2009 | Articles needing additional references (July 2009) |
| Paip2b | Low | Stub | 3 | September 2010 | Wikipedia pages needing cleanup (September 2010), Articles needing cleanup (September 2010), Orphaned articles (February 2013) |
| Pancreatic lipase family | Low | Stub | 1 | April 2012 | Articles to be merged (April 2012) |
| PaNie | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles with too few wikilinks (October 2012) |
| Paper chemicals | Low | Stub | 1 | April 2012 | Articles lacking sources (April 2012) |
| Paper chromatography | High | C | 1 | February 2008 | Articles needing additional references (February 2008) |
| Paraffin wax | High | C | 1 | August 2011 | Articles with unsourced statements (August 2011) |
| Partial molar property | Mid | C | 1 | September 2008 | Articles needing additional references (September 2008) |
| Partial specific volume | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Particle-size analysis | Low | Start | 2 | January 2012 | Articles lacking sources (January 2012), Wikipedia articles needing style editing (January 2012) |
| Particle segregation | Unknown | Unassessed | 1 | August 2011 | Articles needing additional references (August 2011) |
| Partition coefficient | High | B | 2 | April 2010 | Articles with unsourced statements (April 2010, March 2012) |
| Partition equilibrium | Low | Stub | 1 | March 2008 | Articles lacking sources (March 2008) |
| Passerini reaction | Mid | C | 1 | January 2008 | Articles with unsourced statements (January 2008) |
| Pathogenesis-related protein | Low | Stub | 1 | June 2012 | Articles needing additional references (June 2012) |
| Patsy O'Connell Sherman | Low | Start | 2 | November 2010 | Articles with dead external links (November 2010), Articles with unsourced statements (November 2012) |
| Pauli exclusion principle | Mid | B | 2 | April 2009 | Articles with dead external links (April 2009, September 2010) |
| Paul Flory | High | C | 1 | February 2013 | Articles needing additional references (February 2013) |
| Paul Karrer | High | C | 2 | October 2009 | Articles lacking in-text citations (October 2009), Persondata templates without short description parameter |
| Paul Mendelssohn Bartholdy | Low | Stub | 1 | Persondata templates without short description parameter | |
| Paul Pfeiffer (chemist) | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Peace River oil sands | Low | Stub | 1 | All articles needing coordinates | |
| PEG-10 Sunflower Glycerides | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| PEG-150 Jojoba | Low | Stub | 1 | July 2007 | Articles lacking sources (July 2007) |
| PEG-16 macadamia glycerides | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Pensky–Martens closed-cup test | Unknown | Unassessed | 2 | December 2008 | Articles lacking in-text citations (October 2011), Articles needing additional references (December 2008) |
| Pentene | Low | Start | 1 | April 2011 | Articles with unsourced statements (April 2011) |
| Peptide synthesis | High | C | 3 | June 2009 | Articles to be expanded (January 2011), Articles with unsourced statements (February 2013, June 2009) |
| Peptidoglycan binding domain | Low | Stub | 1 | October 2010 | Orphaned articles (October 2010) |
| Percy Lavon Julian | Low | GA | 1 | April 2012 | Articles with dead external links (April 2012) |
| Perfect mixing | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Perinucleolar compartment | Low | Stub | 2 | December 2011 | Wikipedia articles needing clarification (December 2011), All articles needing expert attention |
| Periodate | Unknown | Unassessed | 1 | March 2013 | Articles needing additional references (March 2013) |
| Periodic current reversal | Unknown | Unassessed | 2 | January 2007 | Orphaned articles (February 2009), Articles lacking sources (January 2007) |
| Periodic graph (crystallography) | Low | C | 1 | October 2010 | Articles with unsourced statements (October 2010) |
| Periodic systems of small molecules | Low | Start | 2 | October 2010 | Articles lacking reliable references (July 2011), Wikipedia articles needing style editing (October 2010) |
| Periodic table | Top | FA | 1 | Articles with unsourced statements | |
| Periodic table (vertical) | Low | List | 1 | July 2009 | Articles lacking sources (July 2009) |
| Periodic trends | Mid | C | 3 | June 2007 | Articles needing additional references (June 2007), Articles with unsourced statements (February 2012, January 2011) |
| Period 9 element | Low | C | 1 | December 2012 | Articles to be expanded (December 2012) |
| Perkin triangle | Low | Start | 1 | March 2008 | Articles with unsourced statements (March 2008) |
| Peroxide process | Low | Stub | 3 | November 2008 | Wikipedia articles needing context (November 2008), Wikipedia introduction cleanup (November 2008), Articles lacking sources (November 2008) |
| Peroxodisulfate | Mid | Stub | 1 | December 2006 | Articles lacking sources (December 2006) |
| Peroxomonosulfate | Low | Stub | 2 | December 2006 | Articles lacking sources (December 2006), Articles with unsourced statements (March 2010) |
| Peroxyacyl nitrates | Mid | Stub | 2 | December 2010 | Articles to be merged (August 2012), Articles needing additional references (December 2010) |
| Persistent carbene | Mid | GA | 1 | December 2009 | Articles with unsourced statements (December 2009) |
| Persulfate | Low | Stub | 1 | June 2012 | Articles needing additional references (June 2012) |
| Pertechnetate | Low | Start | 1 | July 2009 | Articles with unsourced statements (July 2009) |
| Peter Agre | Mid | Start | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| Peter Atkins | Low | Start | 2 | August 2011 | Articles with dead external links (August 2011, October 2011) |
| Peter Bruce | Low | Stub | 3 | March 2013 | BLP articles lacking sources (March 2013), Articles to be expanded (March 2013), Persondata templates without short description parameter |
| Peter Goodhew | Low | Stub | 5 | September 2010 | Wikipedia pages needing cleanup (September 2010), Articles needing cleanup (September 2010), Orphaned articles (September 2010), All articles needing expert attention, Persondata templates without short description parameter |
| Peter Griess | Low | Start | 1 | Persondata templates without short description parameter | |
| Peter Maitlis | Low | Start | 1 | Persondata templates without short description parameter | |
| Peter Wothers | Unknown | Stub | 1 | December 2012 | Articles with unsourced statements (December 2012) |
| Petro-aggression | Low | Stub | 1 | February 2013 | Articles needing additional references (February 2013) |
| PFA-100 | Low | Stub | 2 | May 2008 | Articles lacking sources (May 2008), Wikipedia spam cleanup (May 2012) |
| Pharmaceutical industry | Mid | C | 1 | September 2007 | Articles with unsourced statements (September 2007) |
| Phase-boundary catalysis | Unknown | Unassessed | 3 | August 2008 | Wikipedia pages needing cleanup (August 2008), Articles needing cleanup (August 2008), All articles needing expert attention |
| Phase-change material | Unknown | Unassessed | 1 | September 2012 | Wikipedia introduction cleanup (September 2012) |
| Phase diagram | Mid | C | 1 | January 2008 | Articles with unsourced statements (January 2008) |
| Phenacyl | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Phenalkamine | Low | Stub | 2 | December 2009 | Articles lacking sources (December 2009), All articles needing expert attention |
| Phenols | Mid | C | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| Phenylaminotetralin | Unknown | Unassessed | 1 | February 2009 | Orphaned articles (February 2009) |
| Phenyl salicylate | Low | Stub | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Pheromone binding protein | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Philippe de Clermont | Low | Stub | 1 | Persondata templates without short description parameter | |
| Philippe Guyot-Sionnest | Low | Stub | 4 | August 2010 | Orphaned articles (August 2010), Articles lacking reliable references (September 2010), Articles with too few wikilinks (October 2012), Persondata templates without short description parameter |
| Philip Kraft | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Philip P. Cohen | Low | Stub | 1 | December 2011 | Orphaned articles (December 2011) |
| Philip S. Portoghese | Low | Start | 1 | June 2011 | Orphaned articles (June 2011) |
| Phlegmatized | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Phlogiston theory | Mid | B | 3 | February 2010 | Wikipedia articles needing clarification (February 2010), Articles needing additional references (June 2012), Articles with unsourced statements (October 2011) |
| Phosducin family | Low | Stub | 1 | November 2010 | Wikipedia articles in need of updating (November 2010) |
| Phosphate test | Low | Stub | 1 | August 2008 | Articles needing additional references (August 2008) |
| Phosphinate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Phosphinoimidate | Unknown | Unassessed | 1 | April 2013 | Orphaned articles (April 2013) |
| Phosphodiester bond | Mid | Start | 2 | August 2009 | Articles needing additional references (August 2009), Articles with unsourced statements (August 2009) |
| Phosphomonoesters | Low | Stub | 1 | October 2009 | Articles lacking sources (October 2009) |
| Phosphonium coupling | Unknown | Unassessed | 3 | March 2012 | Orphaned articles (February 2013), Wikipedia articles that are too technical (March 2012), All articles needing expert attention |
| Phosphopentose epimerase | Low | Stub | 1 | November 2010 | Articles to be merged (November 2010) |
| Phosphorolysis | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Phosphorus halide | Mid | Start | 2 | November 2008 | Articles to be expanded (July 2010), Articles with unsourced statements (November 2008) |
| Photocatalytic water splitting | Mid | C | 2 | April 2012 | Articles with peacock terms (May 2012), Articles with unsourced statements (April 2012) |
| Photochromic lens | Low | Start | 3 | January 2011 | Articles to be expanded (January 2011), Wikipedia articles needing style editing (November 2012), Articles with unsourced statements (January 2011) |
| Photodegradation | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Photoelectrochemical process | Mid | Start | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Photoionization detector | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Photopolymer | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Phthalate | Mid | Start | 3 | August 2008 | Articles to be expanded (December 2009), Articles needing additional references (August 2008), Articles with unsourced statements (September 2008) |
| Phthalocyanine | Mid | Start | 1 | January 2012 | Articles with unsourced statements (January 2012) |
| PHydrion | Unknown | Stub | 2 | August 2012 | Orphaned articles (August 2012), Articles with too few wikilinks (January 2013) |
| Phyloxin | Low | Stub | 1 | May 2009 | Articles lacking sources (May 2009) |
| Physical chemistry | Top | Start | 4 | February 2007 | Wikipedia pages needing cleanup (August 2011), Articles needing cleanup (August 2011), Articles with unsourced statements (February 2007, February 2013) |
| Physical coefficient | Low | Stub | 1 | August 2008 | Articles lacking sources (August 2008) |
| Physical organic chemistry | High | Start | 1 | June 2010 | Wikipedia introduction cleanup (June 2010) |
| Phytochemistry | High | Start | 1 | November 2006 | Articles lacking sources (November 2006) |
| Phytoecdysteroid | Unknown | Unassessed | 1 | Articles needing more detailed references | |
| PH indicator | High | Start | 1 | May 2012 | Articles needing additional references (May 2012) |
| PH meter | Mid | B | 2 | March 2012 | Articles to be expanded (March 2013), Articles needing additional references (March 2012) |
| PH partition | Low | Stub | 1 | December 2010 | Articles lacking sources (December 2010) |
| Piancatelli rearrangement | Mid | Stub | 1 | November 2012 | Articles with too few wikilinks (November 2012) |
| Picamar | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Picolines | Unknown | Unassessed | 1 | February 2009 | Orphaned articles (February 2009) |
| Pictet–Spengler reaction | Low | B | 2 | November 2010 | Articles with disputed statements (November 2010), Articles with unsourced statements (November 2010) |
| Pidgeon process | Mid | C | 2 | May 2009 | Articles with unsourced statements (July 2012, May 2009) |
| Piero Baglioni | Low | Start | 4 | October 2010 | BLP articles lacking sources (February 2013), Articles with dead external links (October 2010), Articles with links needing disambiguation (January 2012), Persondata templates without short description parameter |
| Pierre-François Chabaneau | Low | GA | 1 | Persondata templates without short description parameter | |
| Pierre Braunstein | Low | Stub | 1 | Persondata templates without short description parameter | |
| Pierre Jean Robiquet | Mid | Start | 1 | Persondata templates without short description parameter | |
| Pierre Louis Dulong | Mid | Start | 1 | Persondata templates without short description parameter | |
| Piezochromism | Low | Stub | 1 | December 2008 | Articles lacking sources (December 2008) |
| PiHKAL | Low | Start | 2 | December 2007 | Articles needing additional references (December 2007), Articles with unsourced statements (April 2013) |
| Pinchbeck (alloy) | Low | Stub | 1 | April 2010 | Articles with unsourced statements (April 2010) |
| Pipeclay triangle | Unknown | Unassessed | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (March 2009) |
| Pipette | Low | Start | 1 | July 2012 | Articles needing additional references (July 2012) |
| Pitrakinra | Low | Stub | 4 | February 2009 | Wikipedia pages needing cleanup (October 2010), Articles needing cleanup (October 2010), Orphaned articles (February 2009), Articles lacking sources (October 2010) |
| Pittcon Editors' Awards | Low | Start | 1 | January 2012 | Wikipedia articles with possible conflicts of interest (January 2012) |
| Pitzer ion interaction | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), All articles needing expert attention |
| Pizda (chemical) | Unknown | Unassessed | 2 | December 2011 | Wikipedia articles needing clarification (December 2011), Articles with topics of unclear notability (September 2012) |
| Pi bond | Top | C | 1 | February 2013 | Articles needing additional references (February 2013) |
| PJ1 TrackBite | Unknown | Unassessed | 2 | February 2009 | Articles needing additional references (February 2009), Articles with unsourced statements (April 2010) |
| Placental lactogen | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Plant stanol ester | Unknown | Unassessed | 2 | March 2012 | Articles with unsourced statements (March 2012, May 2012) |
| Plasma-enhanced chemical vapor deposition | Low | Start | 2 | April 2011 | Articles needing additional references (April 2011), Articles with unsourced statements (August 2011) |
| Plasma activation | Low | Stub | 1 | November 2006 | Articles lacking sources (November 2006) |
| Plasma ashing | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Plastic | High | B | 2 | April 2011 | Articles with dead external links (May 2012), Articles with unsourced statements (April 2011) |
| Plate reader | Low | Start | 2 | April 2012 | Articles needing additional references (April 2012), All articles needing expert attention |
| Plating | Mid | C | 1 | March 2009 | Articles with unsourced statements (March 2009) |
| Platinum sponge | Unknown | Stub | 2 | February 2012 | Articles to be merged (February 2012), Orphaned articles (December 2012) |
| Pluronic P-123 | Unknown | Unassessed | 1 | February 2009 | Orphaned articles (February 2009) |
| Plutonium borides | Unknown | Stub | 2 | September 2008 | Wikipedia pages needing cleanup (September 2008), Articles needing cleanup (September 2008) |
| Poison | High | B | 1 | February 2012 | Articles with unsourced statements (February 2012) |
| Polarimeter | Mid | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Poloxamer | Unknown | Unassessed | 1 | September 2012 | Articles with unsourced statements (September 2012) |
| Polyaminopropyl biguanide | Low | Start | 2 | December 2011 | Articles needing additional references (December 2011), Articles with unsourced statements (December 2011) |
| PolyAPTAC | Unknown | Unassessed | 1 | June 2012 | Articles lacking sources (June 2012) |
| Polybrominated diphenyl ethers | Mid | C | 1 | September 2011 | Articles with dead external links (September 2011) |
| Polychlorinated biphenyl | High | B | 10 | May 2007 | Articles with dead external links (September 2010), Articles needing additional references (February 2011), Articles with unsourced statements (April 2011, July 2010, May 2007, November 2008, October 2010, October 2012, September 2010), Vague or ambiguous geographic scope (February 2012) |
| Polychlorinated dibenzodioxins | High | B | 3 | April 2007 | Wikipedia external links cleanup (June 2010), Wikipedia spam cleanup (June 2010), Articles with unsourced statements (April 2007) |
| Polycide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Polyetherimide | Unknown | Unassessed | 1 | January 2009 | Articles lacking sources (January 2009) |
| Polyfluorene | Unknown | Unassessed | 1 | September 2011 | Articles with specifically marked weasel-worded phrases (September 2011) |
| Polyhalogenated compound | Mid | Start | 1 | February 2009 | Articles needing additional references (February 2009) |
| Polyisocyanurate | Unknown | Unassessed | 3 | October 2012 | Articles needing additional references (October 2012), Articles with unsourced statements (April 2013, October 2012) |
| Polylactic acid | Low | Start | 1 | July 2010 | Articles with unsourced statements (July 2010) |
| Polymer | High | B | 1 | May 2009 | Articles with unsourced statements (May 2009) |
| Polymer brush | Unknown | Unassessed | 2 | December 2009 | Articles to be expanded (March 2013), Articles needing additional references (December 2009) |
| Polymer chemistry | Mid | Start | 1 | July 2012 | Incomplete lists (July 2012) |
| Polymetal | Unknown | Stub | 1 | November 2006 | Articles lacking sources (November 2006) |
| Polyolefin | Unknown | Unassessed | 1 | January 2011 | Articles needing additional references (January 2011) |
| Polyoxometalate | Unknown | Stub | 1 | April 2009 | Articles with unsourced statements (April 2009) |
| Polyphenol | Mid | Start | 8 | December 2010 | Wikipedia articles needing context (December 2011), Articles to be expanded (March 2013), Wikipedia external links cleanup (March 2012), Wikipedia articles needing page number citations (December 2010), Wikipedia spam cleanup (March 2012), Articles with unsourced statements (April 2013, March 2013), All articles needing expert attention |
| Polypropylene polybenzyl isocyanate | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (May 2010) |
| Polyyne | Mid | Stub | 1 | February 2013 | Articles with unsourced statements (February 2013) |
| Porocytes | Low | Stub | 1 | August 2009 | Articles lacking sources (August 2009) |
| Porphyrin | Mid | B | 2 | January 2011 | Articles with unsourced statements (January 2011, October 2011) |
| Positronium | Low | Start | 1 | September 2007 | Articles with unsourced statements (September 2007) |
| Potassium-ion battery | Mid | Start | 1 | December 2011 | NPOV disputes (December 2011) |
| Potassium humate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Potassium tetraiodomercurate(II) | Mid | Start | 1 | August 2010 | Articles with unsourced statements (August 2010) |
| Potassium valerate | Low | Stub | 1 | February 2013 | Orphaned articles (February 2013) |
| Potential gradient | Mid | Start | 1 | March 2013 | Wikipedia articles needing clarification (March 2013) |
| Potential of mean force | Low | Stub | 1 | All articles needing expert attention | |
| Potentiator | Low | Stub | 1 | April 2009 | Articles needing additional references (April 2009) |
| Powder (substance) | Mid | Start | 1 | April 2010 | Articles lacking in-text citations (April 2010) |
| PQS (chemical) | Unknown | Stub | 1 | August 2012 | Articles lacking sources (August 2012) |
| Prealloy | Unknown | Unassessed | 3 | December 2011 | Articles that may contain original research (December 2011), Articles needing additional references (December 2011), All articles needing expert attention |
| Precipitation (chemistry) | High | C | 1 | February 2008 | Articles needing additional references (February 2008) |
| Precipitation polymerization | Unknown | Stub | 2 | May 2010 | Orphaned articles (May 2010), All articles needing expert attention |
| Precursor cell | Low | Stub | 1 | December 2008 | Articles needing additional references (December 2008) |
| Preemergent herbicides | Low | Stub | 2 | December 2009 | Articles needing additional references (December 2009), Articles with unsourced statements (March 2011) |
| Preferred IUPAC name | Mid | Start | 1 | May 2010 | Articles containing potentially dated statements (May 2010) |
| Prehormone | Low | Stub | 1 | February 2007 | Articles lacking sources (February 2007) |
| Primary Aromatic Amine | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Primordial nuclide | Low | Start | 1 | Articles containing potentially dated statements (2013) | |
| Principle of least motion | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| PRO/II | Unknown | Unassessed | 2 | August 2009 | Articles with topics of unclear notability (August 2009), Articles with a promotional tone (January 2012) |
| Process molecular gene concept | Unknown | Unassessed | 1 | April 2012 | Orphaned articles (April 2012) |
| Propargyl | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Propyl | Low | Start | 1 | January 2013 | Articles to be merged (January 2013) |
| Propynyl | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Protease accumulated by inhibitors | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Protective finishing coat | Low | Stub | 3 | February 2007 | Orphaned articles (November 2009), Articles lacking sources (February 2007), Articles with too few wikilinks (December 2012) |
| Protein | Top | GA | 5 | August 2009 | Articles containing potentially dated statements (2009), Articles with dead external links (May 2012), Articles with unsourced statements (August 2009, May 2010, May 2012) |
| Proteose | Low | Stub | 1 | August 2008 | Articles needing additional references (August 2008) |
| Proton conductor | Low | Stub | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| PROX | Unknown | Unassessed | 1 | August 2012 | Articles with unsourced statements (August 2012) |
| Pseudorotation | Unknown | Unassessed | 2 | December 2009 | Articles lacking sources (December 2009), Articles with too few wikilinks (November 2012) |
| PSI (computational chemistry) | Low | Stub | 2 | April 2011 | Articles with topics of unclear notability (April 2011), Articles lacking sources (April 2011) |
| Pt/Co scale | Low | Stub | 1 | January 2013 | Articles with too few wikilinks (January 2013) |
| PubChem | Low | Start | 3 | January 2009 | Wikipedia pages needing cleanup (November 2009), Articles needing cleanup (November 2009), Articles needing additional references (January 2009) |
| Pulickel Ajayan | Low | Start | 2 | August 2011 | BLP articles lacking sources (August 2011), Articles needing additional references (August 2011) |
| Pulp (paper) | Low | C | 2 | July 2009 | Articles with unsourced statements (July 2009, September 2011) |
| Purex (laundry detergent) | Low | Stub | 2 | October 2007 | Articles that may contain original research (October 2007), Articles needing additional references (October 2007) |
| Purified water | Mid | Start | 2 | December 2011 | Articles with dead external links (December 2011), Articles lacking in-text citations (July 2012) |
| Purinones | Unknown | Unassessed | 1 | February 2009 | Orphaned articles (February 2009) |
| Pyrethroid | Mid | C | 2 | June 2012 | Articles with dead external links (June 2012), Articles with unsourced statements (November 2012) |
| Pyrophoricity | Mid | Start | 1 | March 2013 | Articles with dead external links (March 2013) |
| Pyrromethene | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Q-Chem | Low | Stub | 1 | October 2012 | Articles with a promotional tone (October 2012) |
| Q10 (temperature coefficient) | Unknown | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| QPNC-PAGE | Unknown | Unassessed | 1 | April 2011 | Articles needing additional references (April 2011) |
| Qualitative inorganic analysis | Unknown | Unassessed | 1 | February 2013 | Articles needing additional references (February 2013) |
| Quantitative analysis (chemistry) | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Quantum-mechanical explanation of intermolecular interactions | Unknown | Unassessed | 2 | August 2008 | Articles with unsourced statements (August 2008), All articles needing expert attention |
| Quantum chemistry | Top | B | 3 | January 2011 | Wikipedia pages needing cleanup (January 2011), Articles needing cleanup (January 2011), Articles lacking in-text citations (December 2012) |
| Quantum Monte Carlo | Unknown | Unassessed | 1 | All articles needing expert attention | |
| Quarter stick | Low | Stub | 1 | September 2010 | Articles lacking sources (September 2010) |
| Quaternary ammonium cation | Mid | Start | 1 | January 2013 | Articles with unsourced statements (January 2013) |
| Quercitron | Unknown | Unassessed | 2 | February 2012 | Articles lacking in-text citations (February 2012), Articles needing additional references (February 2012) |
| Quickfit apparatus | Low | Start | 1 | July 2009 | Articles lacking sources (July 2009) |
| Quinhydrone electrode | Low | Start | 2 | May 2009 | Articles needing additional references (February 2013), Articles with unsourced statements (May 2009) |
| R-406A | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| R-410A | Mid | B | 2 | October 2010 | Articles with dead external links (October 2010), Articles with unsourced statements (June 2011) |
| RABGEF1 | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Racemic crystallography | Low | Stub | 2 | March 2009 | Orphaned articles (March 2009), Articles with too few wikilinks (October 2012) |
| Racemization | High | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Radical (chemistry) | High | C | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| Radioanalytical chemistry | Mid | C | 1 | June 2012 | Articles with links needing disambiguation (June 2012) |
| Radiolysis | Mid | Start | 2 | August 2008 | Articles with unsourced statements (August 2008, December 2010) |
| Ralph F. Hirschmann | Mid | Start | 1 | Persondata templates without short description parameter | |
| Ralph Louis Wain | Low | Start | 1 | July 2011 | Articles with unsourced statements (July 2011) |
| Ralph Pearson | Unknown | Unassessed | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Random Coil Index | Low | Start | 1 | March 2012 | Orphaned articles (March 2012) |
| Raphael Eduard Liesegang | Low | Stub | 1 | Persondata templates without short description parameter | |
| Rare-cutter enzyme | Low | Stub | 1 | April 2012 | Orphaned articles (April 2012) |
| Raschig process | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Raymond Lemieux | Low | Start | 1 | Persondata templates without short description parameter | |
| Rayon | Low | Start | 3 | March 2008 | Wikipedia articles needing clarification (May 2012), Articles with unsourced statements (February 2010, March 2008) |
| Reactions on surfaces | Unknown | Start | 1 | July 2012 | Articles needing additional references (July 2012) |
| Reactive distillation | Low | Start | 2 | May 2011 | Articles lacking in-text citations (May 2011), Articles needing additional references (May 2011) |
| Reactive oxygen species | Mid | C | 1 | May 2009 | Articles with unsourced statements (May 2009) |
| Reactive oxygen species production in marine microalgae | Unknown | Unassessed | 2 | April 2013 | Wikipedia articles that are too technical (April 2013), All articles needing expert attention |
| Reactivity (chemistry) | Mid | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Reactivity series | Mid | C | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Rechargeable battery | Low | C | 8 | September 2011 | Articles containing potentially dated statements (2009), Articles with dead external links (April 2012, August 2012), Articles needing additional references (January 2013), Articles with unsourced statements (August 2012, November 2011, September 2011, September 2012) |
| Recrystallization (chemistry) | High | C | 1 | October 2009 | Articles needing additional references (October 2009) |
| Redox | Top | Start | 2 | January 2011 | Wikipedia articles needing clarification (January 2011), Articles with unsourced statements (February 2013) |
| Redox indicator | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Redox titration | Low | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Reducing atmosphere | Low | Stub | 1 | May 2009 | Articles needing additional references (May 2009) |
| Reduction of nitro compounds | Mid | Start | 2 | June 2008 | Articles to be expanded (June 2008), Articles with links needing disambiguation (October 2012) |
| Reduction potential | High | Start | 5 | May 2008 | Wikipedia articles needing clarification (February 2012), Articles needing additional references (May 2008, October 2011), Articles with unsourced statements (April 2012, March 2012) |
| Reductive dechlorination | Mid | C | 1 | June 2011 | Articles with links needing disambiguation (June 2011) |
| Red fuming nitric acid | Low | Stub | 1 | May 2010 | Articles with unsourced statements (May 2010) |
| Reference electrode | Mid | C | 2 | July 2011 | Articles with unsourced statements (February 2013, July 2011) |
| Reflectance difference spectroscopy | Unknown | Stub | 1 | June 2010 | Articles needing additional references (June 2010) |
| Refrigerant | Low | C | 4 | October 2012 | Wikipedia pages needing cleanup (October 2012), Articles needing cleanup (October 2012), NPOV disputes (February 2013), Articles with unsourced statements (October 2012) |
| Registration, Evaluation, Authorisation and Restriction of Chemicals | Low | Start | 3 | April 2012 | Articles containing potentially dated statements (February 2013), Articles with unsourced statements (April 2012), Articles needing more detailed references |
| Reichstein process | Low | C | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Relative density | Unknown | Unassessed | 2 | September 2011 | Articles with dead external links (September 2011), Articles with unsourced statements (May 2012) |
| Renata Reisfeld | Mid | Start | 1 | July 2011 | Articles with unsourced statements (July 2011) |
| Replikins | Low | Stub | 1 | October 2009 | Orphaned articles (October 2009) |
| Residual dipolar coupling | Unknown | Unassessed | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| Residual entropy | Low | Start | 2 | December 2009 | Wikipedia articles needing clarification (March 2012), Articles lacking sources (December 2009) |
| Resonance (chemistry) | High | C | 1 | December 2011 | Articles with unsourced statements (December 2011) |
| Resonance fluorescence | Low | Stub | 1 | December 2010 | Articles needing additional references (December 2010) |
| Retarder (chemistry) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Retention distance | Low | Stub | 4 | September 2008 | Wikipedia pages needing cleanup (September 2008), Articles needing cleanup (September 2008), Wikipedia articles that are too technical (June 2012), All articles needing expert attention |
| Retention uniformity | Low | Stub | 1 | December 2011 | Articles needing additional references (December 2011) |
| Retort | Mid | Start | 2 | March 2008 | Articles needing additional references (March 2008), Articles with unsourced statements (April 2012) |
| Reversed-phase chromatography | Low | Stub | 2 | August 2006 | Wikipedia articles needing clarification (September 2008), Articles needing additional references (August 2006) |
| Reversible addition−fragmentation chain-transfer polymerization | Mid | B | 1 | January 2012 | Articles with unsourced statements (January 2012) |
| Reversible charge injection limit | Low | Stub | 1 | October 2008 | Orphaned articles (October 2008) |
| RhoGAP domain | Low | Stub | 1 | January 2012 | Articles with links needing disambiguation (January 2012) |
| Rhondite | Low | Stub | 1 | June 2009 | Articles with topics of unclear notability (June 2009) |
| RiboGreen | Low | Stub | 2 | June 2007 | Orphaned articles (February 2009), Articles lacking sources (June 2007) |
| Richard Anschütz | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Richard F. Heck | High | Start | 2 | October 2010 | Articles with unsourced statements (October 2010), Persondata templates without short description parameter |
| Richard Herz | Low | Stub | 1 | Persondata templates without short description parameter | |
| Richard Kuhn | High | Start | 1 | Persondata templates without short description parameter | |
| Richard Laming | Low | Start | 2 | January 2009 | Articles with unsourced statements (January 2009), Persondata templates without short description parameter |
| Richard Müller (chemist) | Low | Stub | 1 | Persondata templates without short description parameter | |
| Richard Pike | Low | Start | 1 | Persondata templates without short description parameter | |
| Ring pucker | Low | Stub | 2 | February 2009 | Articles lacking sources (February 2009), All articles needing expert attention |
| Ripening | Unknown | Start | 4 | February 2010 | Articles needing additional references (February 2010), Articles with unsourced statements (March 2012), All articles needing expert attention, Articles needing more detailed references |
| Rivalta test | Low | Stub | 2 | July 2009 | Wikipedia articles needing context (July 2009), Wikipedia introduction cleanup (July 2009) |
| Roald Hoffmann | High | Start | 1 | Persondata templates without short description parameter | |
| Robert Boyle | Mid | B | 1 | Persondata templates without short description parameter | |
| Robert Bruce Merrifield | Low | Start | 1 | Persondata templates without short description parameter | |
| Robert Bunsen | High | Start | 2 | March 2011 | Articles with unsourced statements (April 2011, March 2011) |
| Robert Burns Woodward | High | B | 3 | February 2011 | Articles needing additional references (February 2011, March 2012), Articles with unsourced statements (March 2012) |
| Robert Coombe | Low | Start | 1 | Persondata templates without short description parameter | |
| Robert Empie Rogers | Mid | Start | 1 | Persondata templates without short description parameter | |
| Robert H. Wentorf, Jr. | Low | Start | 1 | February 2013 | Articles needing additional references (February 2013) |
| Robert Mond | Mid | Start | 2 | April 2012 | Articles with links needing disambiguation (April 2012), Persondata templates without short description parameter |
| Robert Ogden Doremus | Low | Start | 1 | Persondata templates without short description parameter | |
| Robert Parr | Low | Start | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Robert Plot | Low | Start | 1 | Persondata templates without short description parameter | |
| Robert S. Coleman | Low | Stub | 2 | October 2012 | Articles with topics of unclear notability (October 2012), Persondata templates without short description parameter |
| Robert S. Mulliken | Mid | C | 2 | February 2012 | Articles needing additional references (February 2012), Articles with unsourced statements (February 2012) |
| Robert W. Field | Low | Stub | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Robin Perutz | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Rocaglamide | Unknown | Stub | 2 | January 2012 | Wikipedia articles that are too technical (January 2012), All articles needing expert attention |
| Rodent cocktail | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), Articles lacking sources (March 2009) |
| Roger Festa | Low | Stub | 2 | May 2010 | BLP articles lacking sources (May 2010), Persondata templates without short description parameter |
| Ronald D. Macfarlane | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Ronald Sydney Nyholm | Low | Start | 4 | November 2010 | Wikipedia introduction cleanup (February 2013), Articles with peacock terms (February 2013), Articles with unsourced statements (November 2010), Persondata templates without short description parameter |
| Ronnie Kosloff | Low | Stub | 1 | Persondata templates without short description parameter | |
| Round-bottom flask | Mid | Start | 1 | December 2009 | Articles needing additional references (December 2009) |
| Roy A. Periana | Unknown | Start | 3 | July 2012 | Articles needing cleanup (July 2012), Articles with sections that need to be turned into prose (July 2012), Vague or ambiguous time (July 2012) |
| Roy McWeeny | Low | Stub | 1 | Persondata templates without short description parameter | |
| Rudolf Christian Böttger | Low | Start | 1 | Persondata templates without short description parameter | |
| Rudolph Pariser | Low | Stub | 1 | Persondata templates without short description parameter | |
| Ruff degradation | Low | Stub | 1 | January 2011 | Articles lacking sources (January 2011) |
| Ruggero Santilli | Low | Start | 2 | October 2010 | Articles with dead external links (October 2010), Articles with unsourced statements (September 2012) |
| Rule-based modeling | Low | Stub | 1 | February 2012 | Articles needing additional references (February 2012) |
| Russell Earl Marker | Low | Start | 1 | Persondata templates without short description parameter | |
| Rust | High | Start | 3 | May 2012 | Articles needing additional references (June 2012), Articles with unsourced statements (May 2012, November 2012) |
| Ryong Ryoo | Unknown | Start | 1 | December 2011 | BLP articles lacking sources (December 2011) |
| S* | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| S-equol | Mid | C | 1 | June 2012 | Articles to be merged (June 2012) |
| S-phase-promoting factor | Low | Stub | 2 | September 2009 | Articles lacking sources (September 2009), All articles needing expert attention |
| Sacrificial metal | Unknown | Stub | 1 | September 2011 | Articles lacking sources (September 2011) |
| Salcatonin | Low | Stub | 2 | August 2009 | Orphaned articles (December 2010), Articles lacking sources (August 2009) |
| Salicylate testing | Low | Start | 1 | June 2009 | Articles with unsourced statements (June 2009) |
| Salting in | Low | Stub | 2 | October 2012 | Articles lacking sources (January 2013), Articles with unsourced statements (October 2012) |
| Salt bridge | Mid | C | 1 | May 2009 | Articles lacking sources (May 2009) |
| Salt bridge (protein and supramolecular) | Unknown | Stub | 1 | August 2011 | Articles with unsourced statements (August 2011) |
| Salt extraction process | Unknown | Unassessed | 1 | January 2011 | Articles with topics of unclear notability (January 2011) |
| Samuel J. Danishefsky | Low | C | 1 | Persondata templates without short description parameter | |
| Samuel Luther Dana | Low | Stub | 2 | April 2013 | Articles lacking sources (April 2013), Persondata templates without short description parameter |
| Samuel William Johnson | Mid | Start | 1 | March 2013 | Articles lacking in-text citations (March 2013) |
| SAND protein | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Santoprene | Low | Start | 2 | November 2010 | Articles with topics of unclear notability (November 2010), Articles with a promotional tone (November 2010) |
| Saponifiable lipid | Low | Stub | 1 | February 2008 | Articles lacking sources (February 2008) |
| Saponin | Mid | C | 3 | March 2009 | Articles with unsourced statements (July 2011, March 2009), Wikipedia articles needing factual verification (March 2009) |
| Saturated and unsaturated compounds | High | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Saville reaction | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Schiff test | Mid | C | 2 | November 2011 | Articles with unsourced statements (March 2013, November 2011) |
| Scoville scale | Unknown | Unassessed | 2 | September 2010 | Articles with dead external links (September 2010), Articles with unsourced statements (March 2012) |
| Screaming jelly babies | Low | Stub | 2 | December 2012 | Articles with topics of unclear notability (December 2012), Articles lacking reliable references (December 2012) |
| Sean Ekins | Low | Start | 2 | November 2011 | Wikipedia articles with possible conflicts of interest (November 2011), Articles lacking reliable references (November 2011) |
| Sec14 | Low | Stub | 3 | September 2010 | Articles to be expanded (December 2010), Articles lacking sources (September 2010), All articles needing expert attention |
| Second law of thermodynamics | Top | B | 5 | March 2009 | Articles with disputed statements (March 2009), Articles with unsourced statements (August 2012, May 2013, October 2010), Articles with links needing disambiguation (August 2012) |
| Selenate | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Selenoxide elimination | Mid | C | 1 | August 2012 | Wikipedia references cleanup (August 2012) |
| Self-healing material | Unknown | Unassessed | 1 | January 2012 | Articles with links needing disambiguation (January 2012) |
| Semi-rigid molecule | Unknown | Unassessed | 1 | December 2010 | Articles lacking in-text citations (December 2010) |
| Separation process | Mid | Start | 4 | December 2008 | Articles needing cleanup (December 2008), Articles to be expanded (February 2012), Articles with sections that need to be turned into prose (December 2008), Articles with improper non-free content (July 2012) |
| Separatory funnel | Mid | Start | 1 | October 2011 | Articles needing additional references (October 2011) |
| Separator (electricity) | Low | Start | 1 | August 2012 | Wikipedia articles needing copy edit (August 2012) |
| Sequenceome | Low | Stub | 1 | February 2008 | Articles lacking sources (February 2008) |
| Sequential structure alignment program | Low | Stub | 2 | November 2009 | Wikipedia articles needing context (November 2009), Wikipedia introduction cleanup (November 2009) |
| Sequential walking | Unknown | Stub | 3 | October 2009 | Wikipedia articles needing context (October 2009), Wikipedia introduction cleanup (October 2009), Articles lacking sources (December 2009) |
| Sergey Reformatsky | Low | Start | 1 | Persondata templates without short description parameter | |
| Sesquioxide | Low | Stub | 1 | May 2009 | Articles with unsourced statements (May 2009) |
| Severinghaus electrode | Low | Stub | 1 | March 2011 | Articles lacking in-text citations (March 2011) |
| Seymour Ehrenpreis | Low | Stub | 2 | October 2009 | Articles lacking reliable references (October 2009), Persondata templates without short description parameter |
| Seymour Shapiro | Unknown | Unassessed | 1 | December 2010 | Articles needing additional references (December 2010) |
| Shale oil extraction | Low | FA | 1 | Articles containing potentially dated statements (2010) | |
| Shaman (Cannabis) | Low | Stub | 1 | February 2012 | Articles lacking sources (February 2012) |
| Shana O. Kelley | Unknown | Unassessed | 2 | March 2012 | Articles with dead external links (March 2012), Persondata templates without short description parameter |
| Shape-memory alloy | Low | Start | 2 | December 2012 | Articles with unsourced statements (December 2012), All articles needing expert attention |
| Sharpless epoxidation | Mid | Start | 1 | November 2012 | Articles needing cleanup (November 2012) |
| Shell-Paques process | Mid | Start | 2 | March 2008 | Orphaned articles (April 2011), Articles needing additional references (March 2008) |
| Shell higher olefin process | Mid | Start | 1 | May 2012 | Articles with unsourced statements (May 2012) |
| Shock chlorination | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Shock sensitivity | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Shortix | Low | Stub | 2 | November 2006 | Orphaned articles (February 2009), Articles lacking sources (November 2006) |
| Shredding (disassembling genomic data) | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Sigma bond | Top | C | 1 | February 2011 | Articles needing additional references (February 2011) |
| SiGNa chemistry | Low | Stub | 1 | November 2006 | Orphaned articles (November 2006) |
| Silanes | Low | Start | 1 | April 2013 | Articles to be expanded (April 2013) |
| Silanization | Low | Stub | 3 | July 2007 | Articles to be expanded (August 2008, January 2011), Articles needing additional references (July 2007) |
| Silex Process | Unknown | Unassessed | 1 | March 2011 | Articles with unsourced statements (March 2011) |
| Silicate | High | Start | 1 | July 2010 | Articles with unsourced statements (July 2010) |
| Silicic acid | Mid | Stub | 1 | April 2013 | Articles to be merged (April 2013) |
| Silicone quaternary amine | Low | Stub | 1 | December 2007 | Orphaned articles (December 2007) |
| Silicon alkoxide | Low | Stub | 2 | December 2009 | Orphaned articles (January 2011), Articles lacking sources (December 2009) |
| Silver chloride electrode | Low | B | 2 | November 2007 | Articles with unsourced statements (February 2009, November 2007) |
| Silver nanoparticles | Unknown | Unassessed | 1 | October 2009 | Articles with unsourced statements (October 2009) |
| Silvicide | Unknown | Unassessed | 1 | June 2011 | Articles lacking in-text citations (June 2011) |
| Silylene | Mid | C | 1 | March 2011 | Articles with unsourced statements (March 2011) |
| Silylium ion | Low | Stub | 1 | May 2012 | Articles lacking sources (May 2012) |
| Simple lipid | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), Articles lacking sources (December 2009) |
| Simplified molecular-input line-entry system | Low | Start | 2 | September 2012 | Wikipedia external links cleanup (September 2012), Wikipedia spam cleanup (September 2012) |
| Single bond | High | Stub | 2 | July 2012 | Articles to be expanded (July 2012), Articles needing additional references (August 2012) |
| Size-exclusion chromatography | Mid | Start | 1 | May 2010 | Articles with unsourced statements (May 2010) |
| Skeletal formula | Mid | Start | 2 | April 2012 | Articles needing additional references (April 2012), Articles with links needing disambiguation (May 2012) |
| Skunk (Cannabis) | Low | Stub | 3 | February 2012 | Articles that may contain original research (February 2012), Articles needing additional references (September 2012), Articles with unsourced statements (September 2012) |
| Slope spectroscopy | Unknown | Unassessed | 2 | December 2010 | Articles with topics of unclear notability (December 2010), Articles lacking sources (December 2010) |
| SN2 reaction | Top | Start | 2 | November 2010 | Articles lacking in-text citations (February 2013), Articles with unsourced statements (November 2010) |
| Society of Chemical Industry | Low | Start | 3 | July 2010 | Wikipedia pages needing cleanup (November 2010), Articles needing cleanup (November 2010), Articles with unsourced statements (July 2010) |
| Sodium/proton antiporter 1 | Low | Stub | 1 | January 2013 | Articles with too few wikilinks (January 2013) |
| Sodium arsenite | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Sodium coceth sulfate | Low | Stub | 1 | December 2008 | Orphaned articles (December 2008) |
| Sodium cocoate | Low | Stub | 1 | May 2009 | Articles lacking sources (May 2009) |
| Sodium ferric gluconate complex | Low | Stub | 1 | Articles needing more detailed references | |
| Soft chemistry | Unknown | Unassessed | 3 | April 2010 | Articles to be expanded (May 2010), Articles that may contain original research (April 2010), Orphaned articles (September 2010) |
| Soft Matter (journal) | Low | Start | 1 | June 2012 | Articles with dead external links (June 2012) |
| Solidus (chemistry) | Unknown | Stub | 1 | April 2008 | Articles lacking sources (April 2008) |
| Solubility | High | B | 2 | June 2008 | Articles with unsourced statements (July 2008, June 2008) |
| Solvent | High | B | 2 | February 2011 | Articles needing cleanup (March 2013), Articles with unsourced statements (February 2011) |
| Solvent cabinet | Low | Stub | 1 | December 2006 | Articles lacking sources (December 2006) |
| Solvolysis | Low | Start | 1 | March 2012 | Articles needing additional references (March 2012) |
| SonBinh Nguyen | Low | Stub | 2 | December 2009 | Articles with topics of unclear notability (December 2009), Orphaned articles (November 2010) |
| Soni Oyekan | Low | Stub | 4 | August 2009 | BLP articles lacking sources (August 2009), Wikipedia pages needing cleanup (December 2010), Articles needing cleanup (December 2010), Persondata templates without short description parameter |
| Sophus Mads Jørgensen | Low | Stub | 1 | Persondata templates without short description parameter | |
| Sorbent | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Sourav Pal | Unknown | Unassessed | 4 | June 2010 | BLP articles lacking sources (June 2010), Articles with peacock terms (June 2010), Autobiographical articles (June 2010), Persondata templates without short description parameter |
| Sour (Cannabis) | Low | Stub | 2 | February 2012 | Articles that may contain original research (February 2012), Articles lacking sources (February 2012) |
| Space-filling model | Low | Start | 1 | December 2010 | Articles with unsourced statements (December 2010) |
| Specific rotation | High | Start | 4 | October 2010 | Wikipedia introduction cleanup (January 2013), Articles needing additional references (October 2010), Wikipedia articles that are too technical (October 2010), All articles needing expert attention |
| Spectator ion | Unknown | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Spectrograph | Unknown | Unassessed | 1 | August 2012 | Articles to be merged (August 2012) |
| Spencer Silver | Low | Start | 2 | October 2009 | BLP articles lacking sources (October 2009), Articles that may contain original research (October 2009) |
| Spiegelmer | Unknown | Unassessed | 1 | June 2012 | Wikipedia articles needing clarification (June 2012) |
| Spinning band distillation | Low | Start | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Spin quantum number | Mid | Start | 2 | August 2011 | Articles lacking in-text citations (August 2011), Articles with unsourced statements (February 2012) |
| Spin transition | Unknown | Unassessed | 2 | September 2010 | Wikipedia articles that are too technical (September 2010), All articles needing expert attention |
| Sporolides | Low | Start | 1 | All articles needing expert attention | |
| SpoT | Low | Stub | 1 | January 2009 | Articles needing additional references (January 2009) |
| SPRESI database | Low | Start | 2 | October 2008 | Wikipedia articles with possible conflicts of interest (January 2012), Orphaned articles (October 2008) |
| Squaramide | Low | Stub | 4 | March 2011 | Wikipedia articles needing context (March 2011), Wikipedia introduction cleanup (March 2011), Orphaned articles (March 2012), Articles lacking sources (March 2011) |
| Stabilizer (chemistry) | Unknown | Unassessed | 2 | December 2009 | Articles lacking sources (December 2009), Articles with unsourced statements (December 2010) |
| Staggered conformation | Low | Stub | 2 | March 2011 | Wikipedia articles needing context (March 2011), Wikipedia introduction cleanup (March 2011) |
| Staircase voltammetry | Low | Stub | 1 | March 2011 | Articles needing additional references (March 2011) |
| Standard conditions for temperature and pressure | High | B | 2 | September 2010 | Articles with dead external links (September 2010), Articles with unsourced statements (May 2012) |
| Stanford Moore | High | Stub | 2 | March 2013 | Articles lacking in-text citations (March 2013), Persondata templates without short description parameter |
| Stanislao Cannizzaro | Low | Start | 1 | Persondata templates without short description parameter | |
| Stanislav Brebera | Low | Stub | 1 | Persondata templates without short description parameter | |
| Stannide | Low | Start | 1 | January 2011 | Orphaned articles (January 2011) |
| Stannite (ion) | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Starting fluid | Unknown | Unassessed | 1 | June 2009 | Articles with unsourced statements (June 2009) |
| Starve-fed | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Staufen (protein) | Low | Stub | 1 | July 2010 | Articles needing additional references (July 2010) |
| Steam distillation | Low | C | 1 | August 2007 | Articles needing additional references (August 2007) |
| Stearate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Steel | High | GA | 2 | April 2012 | Articles with dead external links (April 2012), Articles with unsourced statements (February 2013) |
| Stereoelectronics | Low | Stub | 1 | March 2007 | Articles lacking sources (March 2007) |
| Steroid hydroxylases | Low | Stub | 1 | October 2012 | Articles lacking sources (October 2012) |
| Steven V. Ley | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Stickum | Unknown | Stub | 1 | April 2011 | Articles lacking sources (April 2011) |
| Stock solution | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Stoichiometric point | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Stopcock | Low | Start | 1 | October 2008 | Articles lacking sources (October 2008) |
| Streaming current | Unknown | Unassessed | 1 | December 2010 | Articles with unsourced statements (December 2010) |
| Stress corrosion cracking | Unknown | Unassessed | 1 | December 2007 | Articles needing additional references (December 2007) |
| Strobilurin | Unknown | Unassessed | 1 | July 2011 | Wikipedia articles needing clarification (July 2011) |
| Strong salts | Unknown | Unassessed | 1 | March 2007 | Articles lacking sources (March 2007) |
| Strontium aluminate | Low | Start | 1 | April 2008 | Articles needing additional references (April 2008) |
| Structural analog | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Structural formula | High | Start | 1 | June 2009 | Articles needing additional references (June 2009) |
| Stuart A. Rice | Unknown | Start | 1 | Persondata templates without short description parameter | |
| Styrene maleic anhydride | Unknown | Unassessed | 1 | March 2008 | Articles needing additional references (March 2008) |
| Sugar alcohol | Unknown | Unassessed | 1 | April 2007 | Articles with unsourced statements (April 2007) |
| Sulfate | High | Start | 2 | January 2011 | Wikipedia articles needing clarification (January 2011), Articles with unsourced statements (May 2012) |
| Sulfide stress cracking | Unknown | Unassessed | 2 | May 2009 | Articles lacking sources (December 2009), Articles with unsourced statements (May 2009) |
| Sulfite | High | C | 2 | September 2011 | Articles with disputed statements (October 2012), Articles with unsourced statements (September 2011) |
| Sulfite process | High | C | 1 | October 2010 | Articles with dead external links (October 2010) |
| Sulfur dye | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Sultone | Low | Start | 1 | October 2010 | Articles with dead external links (October 2010) |
| Supercritical adsorption | Unknown | Unassessed | 1 | February 2009 | Orphaned articles (February 2009) |
| Superheated water | Mid | B | 1 | October 2010 | Articles with dead external links (October 2010) |
| Superhydrophilicity | Low | Start | 1 | June 2011 | Articles with unsourced statements (June 2011) |
| Superloy | Low | Start | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Superplasticizer | Unknown | Unassessed | 2 | October 2010 | Wikipedia pages needing cleanup (October 2010), Articles needing cleanup (October 2010) |
| Superstructure (condensed matter) | Unknown | Stub | 1 | September 2012 | Articles lacking sources (September 2012) |
| Surfactant | Mid | C | 2 | January 2011 | Articles with unsourced statements (August 2011, January 2011) |
| Suzanne Fortier | Low | Stub | 1 | Persondata templates without short description parameter | |
| Sven Erik Jørgensen | Low | Stub | 1 | Persondata templates without short description parameter | |
| Swelling capacity | Low | Stub | 1 | January 2011 | Articles lacking sources (January 2011) |
| Symmetry element | Low | Stub | 1 | November 2006 | Articles lacking sources (November 2006) |
| Synthetic diamond | Mid | FA | 1 | Articles containing potentially dated statements (2012) | |
| Synthetic rubber | Mid | Start | 1 | July 2012 | Articles with unsourced statements (July 2012) |
| Synthetic substance | Unknown | Stub | 1 | April 2012 | Articles lacking sources (April 2012) |
| Synthonia | Unknown | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Syn and anti addition | Mid | Start | 1 | December 2009 | Articles lacking sources (December 2009) |
| Syringe filter | Low | C | 3 | February 2007 | Articles needing additional references (February 2007), Articles with unsourced statements (February 2007), All articles needing expert attention |
| T. Stephen Crawford | Low | Start | 1 | Persondata templates without short description parameter | |
| Table of naturally occurring tryptamines | NA | List | 1 | August 2008 | Incomplete lists (August 2008) |
| Tacticity | Mid | C | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Tafel equation | Low | Start | 1 | October 2008 | Articles needing additional references (October 2008) |
| Tar | Mid | C | 1 | March 2013 | Articles with unsourced statements (March 2013) |
| TBST | Low | Stub | 3 | March 2009 | Wikipedia articles needing context (October 2009), Wikipedia introduction cleanup (October 2009), Articles needing additional references (March 2009) |
| Tear gas | Mid | Start | 1 | July 2012 | Articles needing additional references (July 2012) |
| Tellurite (ion) | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Ternary compound | Unknown | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Terne | Unknown | Unassessed | 2 | November 2009 | Articles lacking sources (November 2009), Articles with unsourced statements (November 2009) |
| Terpene | Mid | Start | 1 | April 2008 | Articles with unsourced statements (April 2008) |
| Tetra-amido macrocyclic ligand | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Tetracoordinate | Mid | Stub | 1 | January 2007 | Articles lacking sources (January 2007) |
| Tetrahedron (journal) | Mid | Start | 1 | January 2013 | Articles containing potentially dated statements (January 2013) |
| Tetrahydrate | Low | Stub | 1 | February 2007 | Articles lacking sources (February 2007) |
| Tetranortriterpenoid | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Tetrapeptide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Tetraphenylethylene | Unknown | Unassessed | 3 | March 2011 | Wikipedia articles needing clarification (March 2011), Articles with disputed statements (March 2011), Articles with unsourced statements (March 2011) |
| Tetrasaccharide | Low | Stub | 1 | November 2006 | Articles lacking sources (November 2006) |
| Tetraterpenoid | Low | Stub | 1 | February 2012 | Articles to be merged (February 2012) |
| Tetrytol | Low | Stub | 1 | July 2007 | Articles lacking sources (July 2007) |
| Thearubigin | Low | Start | 2 | December 2006 | Articles needing additional references (December 2006), Articles with unsourced statements (July 2008) |
| Theodore William Richards | High | C | 1 | June 2010 | Articles with dead external links (June 2010) |
| Theodor Curtius | Mid | Start | 1 | Persondata templates without short description parameter | |
| Theodor Wertheim | Low | Stub | 1 | December 2009 | Articles to be expanded (December 2009) |
| Theoretical chemistry | High | Start | 4 | January 2011 | Wikipedia pages needing cleanup (January 2011), Articles needing cleanup (January 2011), Articles with unsourced statements (February 2013), Articles with specifically marked weasel-worded phrases (February 2012) |
| Theoretical oxygen demand | Unknown | Unassessed | 2 | December 2008 | Articles lacking sources (December 2008), All articles needing expert attention |
| Thermal decomposition | Mid | Start | 2 | August 2010 | Articles lacking sources (October 2011), Articles with unsourced statements (August 2010) |
| Thermal hydrolysis | Mid | Stub | 1 | November 2012 | Articles lacking in-text citations (November 2012) |
| Thermite | Mid | C | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| Thermochromatic ink | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Thermodynamics of micellization | Unknown | Unassessed | 4 | June 2012 | Wikipedia articles needing context (June 2012), Wikipedia introduction cleanup (June 2012), Wikipedia articles that are too technical (June 2012), All articles needing expert attention |
| Thermodynamic databases for pure substances | Mid | C | 2 | December 2007 | Wikipedia pages needing cleanup (December 2007), Articles needing cleanup (December 2007) |
| Thermodynamik chemischer Vorgänge | Low | Stub | 2 | June 2011 | Wikipedia pages needing cleanup (June 2011), Articles needing cleanup (June 2011) |
| Thermokinetics | Low | Stub | 1 | September 2011 | Orphaned articles (September 2011) |
| Thermoplastic | Mid | Start | 3 | October 2009 | Articles needing additional references (October 2009), Articles with unsourced statements (January 2011, June 2012) |
| Thermoplastic polyurethane | Low | Start | 3 | September 2010 | Articles needing additional references (October 2011), Wikipedia articles that are too technical (September 2010), All articles needing expert attention |
| Thermoporometry and cryoporometry | Low | Start | 1 | September 2011 | Articles with unsourced statements (September 2011) |
| Thermoset polymer matrix | Unknown | Unassessed | 2 | April 2009 | Orphaned articles (April 2009), Articles needing additional references (April 2009) |
| The Combustion Institute | Mid | Start | 2 | August 2009 | Articles needing additional references (August 2009), Articles lacking reliable references (August 2009) |
| The Principles of Quantum Mechanics | Low | Start | 2 | September 2011 | Articles needing additional references (January 2012), Articles with unsourced statements (September 2011) |
| The Sceptical Chymist | Mid | Start | 1 | October 2011 | Articles needing additional references (October 2011) |
| Thiacalixarene | Unknown | Unassessed | 2 | February 2009 | Orphaned articles (February 2009), Articles lacking sources (December 2009) |
| Thickening agent | Low | Start | 3 | March 2008 | Articles to be expanded (March 2008), Articles needing additional references (June 2011), Articles with unsourced statements (April 2011) |
| Thioamide | Low | Start | 1 | November 2007 | Articles with unsourced statements (November 2007) |
| Thiocarboxy | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Thiocyanatoiron | Low | Start | 1 | November 2012 | Articles lacking in-text citations (November 2012) |
| Thioketal | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Thiolysis | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Thioselenide | Low | Stub | 2 | September 2008 | Orphaned articles (February 2009), Articles lacking sources (September 2008) |
| Third law of thermodynamics | Top | Start | 2 | January 2013 | Wikipedia articles needing page number citations (January 2013), Articles with unsourced statements (January 2013) |
| Thomas Anderson (chemist) | Low | Stub | 1 | Persondata templates without short description parameter | |
| Thomas H. Chilton | Low | C | 1 | May 2011 | Articles with unsourced statements (May 2011) |
| Thomas J. Katz | Unknown | Unassessed | 1 | Persondata templates without short description parameter | |
| Thomsen–Berthelot principle | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Throughput rate | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Tide (brand) | Low | Start | 1 | January 2013 | Articles containing potentially dated statements (January 2013) |
| Tiffeneau–Demjanov rearrangement | Mid | C | 2 | July 2011 | Wikipedia articles needing clarification (July 2011), Articles with unsourced statements (July 2011) |
| Timeline of chemical elements discoveries | Mid | List | 3 | September 2010 | Wikipedia articles needing clarification (March 2011), Articles with dead external links (September 2010), Articles with disputed statements (December 2010) |
| Titanium alloy | Low | Start | 1 | August 2010 | Articles with unsourced statements (August 2010) |
| Titanium hydride | Low | Start | 1 | March 2013 | Articles to be expanded (March 2013) |
| Titration curve | Unknown | Unassessed | 2 | August 2008 | Articles to be merged (September 2011), Articles lacking sources (August 2008) |
| TN 753 | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Tobin J. Marks | Low | Stub | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Tolman's rule | Unknown | Unassessed | 1 | December 2012 | Articles to be merged (December 2012) |
| Tonite (explosive) | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Tony Swain (chemist) | Low | Stub | 1 | May 2011 | Accuracy disputes (May 2011) |
| Tool steel | Low | C | 1 | August 2009 | Articles needing additional references (August 2009) |
| Torbjørn Gaarder | Low | Stub | 1 | Persondata templates without short description parameter | |
| Total analysis system | Unknown | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Total dissolved solids | Mid | C | 1 | August 2011 | Articles needing additional references (August 2011) |
| Total organic carbon | Mid | Start | 3 | January 2009 | Articles needing additional references (April 2012, January 2009), Articles with unsourced statements (April 2012) |
| Toxic equivalent | Low | Stub | 1 | February 2010 | Articles lacking in-text citations (February 2010) |
| Toxin | Mid | Start | 3 | August 2008 | Articles with unsourced statements (August 2008, February 2010, November 2010) |
| Toxinology | Low | Start | 2 | February 2010 | Articles needing additional references (February 2010), All articles needing expert attention |
| Trace Metal Detection Test | Unknown | Unassessed | 1 | May 2011 | Orphaned articles (May 2011) |
| Transaldolase B | Low | Stub | 1 | September 2010 | Articles to be merged (September 2010) |
| Transition state | High | C | 1 | November 2011 | Articles with unsourced statements (November 2011) |
| Transition state theory | Unknown | Unassessed | 1 | April 2009 | Articles with unsourced statements (April 2009) |
| Translocase | Unknown | Unassessed | 2 | May 2012 | Wikipedia articles needing context (May 2012), Wikipedia introduction cleanup (May 2012) |
| Transmission coefficient | Low | Stub | 1 | February 2009 | Wikipedia articles needing clarification (February 2009) |
| Transport length | Unknown | Unassessed | 1 | January 2011 | Orphaned articles (January 2011) |
| Trehalose dimycolate | Low | Stub | 1 | August 2012 | Articles to be merged (August 2012) |
| Tricarbon | Low | Start | 3 | September 2009 | Articles needing additional references (September 2009), Articles with unsourced statements (May 2012, September 2009) |
| Tricarboxylic acid | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Trichothecene | Low | C | 2 | October 2008 | Articles needing additional references (October 2008), Articles with unsourced statements (September 2010) |
| Tricyclic | Mid | Start | 1 | January 2010 | Articles needing additional references (January 2010) |
| Trigonal pyramidal molecular geometry | High | Start | 1 | January 2008 | Articles with unsourced statements (January 2008) |
| Trihalide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Trimellitic anhydride chloride | Low | Stub | 1 | February 2012 | Articles needing additional references (February 2012) |
| Trimer (chemistry) | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Tripeptide | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Triphenylcyclopropenium bromide | Low | Stub | 3 | December 2010 | Orphaned articles (December 2010), Articles needing additional references (December 2010), All articles needing expert attention |
| Triplet oxygen | Mid | Start | 2 | April 2011 | Articles lacking in-text citations (April 2011), Articles with unsourced statements (July 2011) |
| Triplet state | Low | Start | 1 | December 2010 | Articles lacking in-text citations (December 2010) |
| Triple bond | Mid | Start | 1 | December 2012 | Articles with unsourced statements (December 2012) |
| Trisaccharide | Unknown | Unassessed | 1 | December 2012 | Articles lacking sources (December 2012) |
| Triterpene | Low | Stub | 1 | April 2013 | Articles with unsourced statements (April 2013) |
| Trough battery | Low | Start | 1 | January 2007 | Articles lacking sources (January 2007) |
| Trygve Helgaker | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| TURBOMOLE | Unknown | Stub | 1 | November 2012 | Articles lacking reliable references (November 2012) |
| Ugi reaction | High | C | 1 | February 2007 | Articles with unsourced statements (February 2007) |
| Ulrich Kortz | Mid | Start | 1 | All articles needing expert attention | |
| Ultrafast molecular process | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Uma Chowdhry | Mid | Start | 2 | April 2008 | Articles with a promotional tone (April 2008), Persondata templates without short description parameter |
| Umpolung | Mid | C | 1 | October 2011 | Articles with unsourced statements (October 2011) |
| Underpotential deposition | Low | Stub | 2 | September 2010 | Wikipedia articles that are too technical (September 2010), All articles needing expert attention |
| Unhydrolysable glucose polymers | Low | Stub | 3 | February 2012 | Wikipedia articles with possible conflicts of interest (February 2012), Articles to be merged (February 2012), All articles needing expert attention |
| Uniaxial crystal | Unknown | Unassessed | 3 | September 2009 | Wikipedia articles needing clarification (September 2009), Articles lacking sources (September 2009), Wikipedia articles needing style editing (September 2009) |
| Unimolecular rectifier | Low | Start | 1 | Articles containing potentially dated statements (2012) | |
| Unrestricted Hartree–Fock | Low | Start | 1 | Pages with DOIs inactive since 2010 | |
| Unsaturated hydrocarbon | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| UNS C69100 | Unknown | Unassessed | 1 | June 2010 | Articles needing additional references (June 2010) |
| Uranium oxide | Low | Stub | 1 | December 2009 | Articles needing additional references (December 2009) |
| Uranous | Unknown | Unassessed | 1 | December 2009 | Articles lacking sources (December 2009) |
| Utpal Banerjee | Low | Start | 1 | Persondata templates without short description parameter | |
| UV pinning | Low | Start | 2 | February 2009 | Articles lacking in-text citations (November 2010), Orphaned articles (February 2009) |
| Uwe Meierhenrich | Low | Start | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Vacuum deposition | Low | Start | 1 | April 2009 | Articles lacking in-text citations (April 2009) |
| Vacuum fusion | Low | Stub | 2 | November 2006 | Orphaned articles (November 2006), Articles lacking sources (December 2009) |
| Valence (chemistry) | High | B | 2 | December 2012 | Articles with unsourced statements (December 2012), All articles needing expert attention |
| Valence isomer | Mid | Start | 1 | February 2013 | Articles needing additional references (February 2013) |
| Valency interaction formula | Unknown | Unassessed | 1 | October 2012 | Articles needing additional references (October 2012) |
| Valerate | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Vanadium redox battery | Low | C | 1 | April 2013 | Wikipedia articles needing factual verification (April 2013) |
| Van der Waals force | High | C | 2 | January 2013 | Wikipedia articles that are too technical (January 2013), All articles needing expert attention |
| Van der Waals molecule | Low | Stub | 1 | December 2010 | Articles lacking in-text citations (December 2010) |
| Van der Waals surface | Low | Stub | 2 | July 2011 | Articles lacking sources (July 2011), Articles with unsourced statements (July 2011) |
| Vapor | Unknown | Unassessed | 1 | May 2013 | Articles with unsourced statements (May 2013) |
| Variational Transition State Theory | Unknown | Unassessed | 2 | November 2008 | Articles needing additional references (November 2008), Articles with too few wikilinks (November 2012) |
| VG-1 | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Vicalloy | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Vicinal (chemistry) | Mid | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Victor Darley-Usmar | Low | Start | 1 | April 2010 | Orphaned articles (April 2010) |
| Victor Gold (chemist) | Low | Stub | 1 | Persondata templates without short description parameter | |
| Victor Grignard | High | Start | 1 | Persondata templates without short description parameter | |
| Victor Meyer apparatus | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Vidarabine phosphate | Low | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Vincenzo Balzani | Low | Stub | 1 | Persondata templates without short description parameter | |
| Vinylogy | Low | Start | 2 | December 2012 | Wikipedia articles needing clarification (December 2012), Wikipedia introduction cleanup (January 2013) |
| Vinyloop | Unknown | Start | 1 | November 2012 | Articles with dead external links (November 2012) |
| Vinyl cation | Low | Stub | 3 | August 2009 | Wikipedia articles needing clarification (August 2009), Articles to be expanded (August 2009), Articles lacking sources (August 2009) |
| Vinyl halide | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| VirA protein | Low | Stub | 2 | February 2009 | Orphaned articles (February 2009), Articles with too few wikilinks (October 2012) |
| Vitallium | Unknown | Unassessed | 1 | March 2013 | Articles with dead external links (March 2013) |
| Vitamin D | Mid | B | 4 | November 2010 | Articles containing potentially dated statements (November 2010), Articles with dead external links (January 2011, May 2011), Articles lacking reliable references (April 2011) |
| Viton | Low | Stub | 1 | December 2008 | Articles needing additional references (December 2008) |
| Vittorio Erspamer | Low | Start | 1 | Persondata templates without short description parameter | |
| Vladimir Fock | Low | Start | 1 | Persondata templates without short description parameter | |
| Vladimir Haensel | Low | Start | 3 | February 2012 | Articles needing additional references (February 2013), Articles with unsourced statements (February 2012), Persondata templates without short description parameter |
| Vladimir Markovnikov | Low | Start | 1 | Persondata templates without short description parameter | |
| Volatile organic compound | Low | C | 5 | January 2009 | Wikipedia pages needing cleanup (January 2009), Articles needing cleanup (January 2009), Articles with dead external links (November 2012, September 2010), Articles with unsourced statements (April 2013) |
| Voltaic pile | Low | Start | 1 | December 2010 | Articles lacking in-text citations (December 2010) |
| Voltameter | Low | Start | 1 | May 2011 | Articles to be expanded (May 2011) |
| Volumetric heat capacity | Low | Start | 2 | February 2010 | Articles with unsourced statements (February 2010, January 2012) |
| Volume percent | Unknown | Unassessed | 1 | August 2007 | Articles needing additional references (August 2007) |
| VRLA battery | Low | C | 5 | April 2011 | Wikipedia articles needing clarification (March 2013), Wikipedia articles with possible conflicts of interest (January 2012), Articles lacking in-text citations (April 2011), Articles needing additional references (January 2012), Articles with unsourced statements (March 2013) |
| Vulcanization | Mid | C | 1 | November 2012 | Articles needing additional references (November 2012) |
| W. Albert Noyes, Jr. | Low | Stub | 1 | Persondata templates without short description parameter | |
| Walter Dieckmann | Low | Stub | 1 | Persondata templates without short description parameter | |
| Walter Gilbert | Mid | Start | 1 | Persondata templates without short description parameter | |
| Walter Heitler | High | C | 1 | Persondata templates without short description parameter | |
| Walter Minder | Low | Stub | 1 | Persondata templates without short description parameter | |
| Walter Noddack | Low | Start | 1 | Persondata templates without short description parameter | |
| Walter Reppe | Low | C | 3 | February 2007 | Wikipedia articles needing clarification (February 2012), Articles with unsourced statements (February 2007), Persondata templates without short description parameter |
| Walter Thiel (chemist) | Low | Start | 1 | February 2013 | BLP articles lacking sources (February 2013) |
| Walther Nernst | High | Start | 1 | Persondata templates without short description parameter | |
| Warren K. Lewis | Unknown | Stub | 1 | Persondata templates without short description parameter | |
| Wash bottle | Low | C | 1 | October 2010 | Articles needing additional references (October 2010) |
| Water chemistry analysis | Mid | Stub | 1 | July 2011 | Articles lacking sources (July 2011) |
| Water chlorination | Mid | Start | 1 | July 2010 | Articles with dead external links (July 2010) |
| Water model | Low | B | 1 | November 2010 | Articles with unsourced statements (November 2010) |
| Water number | Low | Stub | 5 | October 2011 | Wikipedia articles needing clarification (January 2013), Wikipedia articles needing context (January 2013), Wikipedia introduction cleanup (January 2013), Orphaned articles (February 2013), Articles lacking sources (October 2011) |
| Water splitting | Unknown | Unassessed | 3 | February 2007 | Articles containing potentially dated statements (2005), Articles that may contain original research (November 2011), Articles with unsourced statements (February 2007) |
| Water substance | Low | Stub | 2 | June 2011 | Articles with topics of unclear notability (June 2011), Articles lacking sources (June 2011) |
| Water vapor | Mid | B | 1 | May 2013 | Articles with dead external links (May 2013) |
| Wayne L. Hubbell | Low | Start | 2 | February 2013 | Articles lacking in-text citations (February 2013), Persondata templates without short description parameter |
| Wöhler process | Low | Stub | 1 | December 2009 | Articles lacking sources (December 2009) |
| Weak base | Mid | Start | 1 | April 2009 | Articles needing additional references (April 2009) |
| Weak salt | Low | Stub | 1 | May 2007 | Articles lacking sources (May 2007) |
| Webster's reagent | Mid | Stub | 1 | February 2009 | Orphaned articles (February 2009) |
| Weidel's reaction | Low | Stub | 1 | April 2010 | Articles lacking sources (April 2010) |
| Weighing bottle | Unknown | Unassessed | 1 | January 2011 | Orphaned articles (January 2011) |
| Weldon process | Low | Stub | 1 | May 2012 | Articles with unsourced statements (May 2012) |
| Werner Kern (chemist) | Low | Stub | 1 | Persondata templates without short description parameter | |
| Weston T. Borden | Low | Stub | 1 | Persondata templates without short description parameter | |
| Wetrock | Low | Stub | 1 | October 2008 | Articles lacking sources (October 2008) |
| Wet chemistry | Low | Stub | 1 | July 2009 | Articles lacking sources (July 2009) |
| Wet electrons | Unknown | Stub | 1 | January 2011 | Orphaned articles (January 2011) |
| Wet nanotechnology | Low | Start | 2 | May 2012 | Articles that may contain original research (May 2012), Wikipedia articles needing style editing (May 2012) |
| Wharton olefin synthesis | Unknown | Unassessed | 2 | September 2011 | Articles to be merged (September 2011), Articles with too few wikilinks (November 2012) |
| Wharton reaction | Low | Start | 1 | September 2011 | Articles to be merged (September 2011) |
| Wilhelm Fleischmann | Low | Stub | 1 | Persondata templates without short description parameter | |
| Wilhelm Haarmann | Mid | Stub | 1 | Persondata templates without short description parameter | |
| Wilhelm Knop | Low | Stub | 1 | Persondata templates without short description parameter | |
| Wilhelm Meyerhoffer | Low | Stub | 1 | Persondata templates without short description parameter | |
| Wilhelm Michler | Low | Stub | 1 | Persondata templates without short description parameter | |
| William Arthur Bone | Low | Stub | 2 | October 2010 | Articles with dead external links (October 2010), Persondata templates without short description parameter |
| William Christopher Zeise | Low | Stub | 1 | November 2009 | Articles lacking sources (November 2009) |
| William D. Emmons | Low | Stub | 1 | Persondata templates without short description parameter | |
| William Edward Hanford | Mid | C | 1 | Persondata templates without short description parameter | |
| William Giauque | High | C | 1 | Persondata templates without short description parameter | |
| William H. Schlesinger | Low | Start | 1 | February 2013 | Articles lacking in-text citations (February 2013) |
| William Henry (chemist) | Low | Start | 1 | Persondata templates without short description parameter | |
| William Henry Chandler (chemist) | Low | Start | 2 | April 2013 | Articles lacking sources (April 2013), Persondata templates without short description parameter |
| William Henry Perkin | High | B | 1 | August 2012 | Wikipedia introduction cleanup (August 2012) |
| William Howard Stein | High | Stub | 1 | February 2013 | Articles needing additional references (February 2013) |
| William Jackson Pope | Low | Stub | 1 | Persondata templates without short description parameter | |
| William Lipscomb | Low | C | 1 | All articles needing expert attention | |
| William Moffitt | Low | Start | 1 | Persondata templates without short description parameter | |
| William Rintoul | Low | Start | 1 | Persondata templates without short description parameter | |
| William T. Miller | Low | C | 2 | November 2010 | Articles to be expanded (November 2010), Persondata templates without short description parameter |
| Wilma Olson | Unknown | Start | 3 | November 2012 | BLP articles lacking sources (November 2012), Articles lacking reliable references (November 2012), Persondata templates without short description parameter |
| Wilson Baker | Low | Start | 1 | Persondata templates without short description parameter | |
| Windshield washer fluid | Unknown | Unassessed | 4 | June 2010 | Wikipedia articles needing clarification (June 2010), Articles with unsourced statements (August 2010, November 2010), Articles needing more detailed references |
| Wiswesser's rule | Mid | Stub | 2 | February 2009 | Orphaned articles (February 2009), All articles needing expert attention |
| World Wide Molecular Matrix | Low | Start | 4 | December 2010 | Articles lacking in-text citations (December 2010), Articles needing additional references (December 2010), Articles with unsourced statements (December 2010), Wikipedia articles needing factual verification (December 2010) |
| Wrought iron | Mid | C | 3 | March 2011 | Articles with unsourced statements (February 2013, March 2011), Articles needing more detailed references |
| Wurtzite crystal structure | Low | Stub | 2 | January 2012 | Articles lacking sources (January 2012), Articles with unsourced statements (January 2012) |
| X-ray crystallography | High | GA | 4 | February 2009 | Wikipedia articles needing clarification (February 2009, January 2013), Articles with unsourced statements (November 2011, October 2011) |
| XDrawChem | Low | Stub | 3 | November 2012 | Accuracy disputes (November 2012), Articles with topics of unclear notability (November 2012), Articles lacking reliable references (November 2012) |
| XL-IM | Low | Stub | 2 | April 2009 | Articles with topics of unclear notability (April 2009), Orphaned articles (September 2010) |
| Xyloside | Low | Stub | 1 | May 2010 | Articles needing additional references (May 2010) |
| Xylosyltransferase | Low | Stub | 1 | April 2008 | Articles lacking sources (April 2008) |
| Yellowcake | Mid | Start | 1 | All articles needing expert attention | |
| Yellow fluorescent protein | Low | Stub | 1 | December 2011 | Articles to be merged (December 2011) |
| Young–Laplace equation | High | Start | 1 | April 2012 | Articles with specifically marked weasel-worded phrases (April 2012) |
| Yttrium lithium fluoride | Low | Stub | 1 | January 2007 | Articles lacking sources (January 2007) |
| Yttrium nitride | Low | Stub | 1 | June 2010 | Articles with dead external links (June 2010) |
| Yuriy Polyakov | Low | C | 1 | Persondata templates without short description parameter | |
| Yuri Lvov | Unknown | Unassessed | 5 | August 2008 | Wikipedia pages needing cleanup (September 2008), Articles needing cleanup (September 2008), Orphaned articles (February 2009), Articles with a promotional tone (August 2008), Persondata templates without short description parameter |
| Zalium | Low | Stub | 2 | December 2008 | Articles with topics of unclear notability (December 2008), Orphaned articles (February 2009) |
| Zeotropic mixture | Unknown | Stub | 1 | January 2012 | Wikipedia articles needing clarification (January 2012) |
| Zerewitinoff determination | Mid | Stub | 1 | March 2009 | Articles lacking sources (March 2009) |
| Zinc–air battery | Mid | C | 1 | June 2009 | Articles with unsourced statements (June 2009) |
| Zinc–zinc oxide cycle | Unknown | Stub | 1 | September 2011 | Wikipedia articles needing context (September 2011) |
| Zinc concentrate | Low | Start | 1 | December 2006 | Articles lacking sources (December 2006) |
| Zirconate | Low | Stub | 1 | January 2011 | Orphaned articles (January 2011) |