(chemistry) one of the isomeric dicarboxylic acids produced by the distillation of citric acid, or as metabolites by microorganisms, CH₂=C(CO₂H)-CH₂CO₂H

(chemistry) one of the isomeric dicarboxylic acids produced by the distillation of citric acid, or as metabolites by microorganisms, trans-CH₃-C(CO₂H)=CHCO₂H; the cis-isomer is citraconic acid

(chemistry) A dark liquid, produced by the destructive distillation of wood, containing acetic acid, methanol, oils and tars; once used as a commercial source of acetic acid.

(obsolete, chemistry) Maleic acid.

(inorganic chemistry, Britain) Alternative spelling of pyrosulfuric acid

(dated, organic chemistry) furoic acid

(inorganic chemistry) The acid, H₂S₂O₇, formed by the reaction of sulfur trioxide with sulfuric acid; used in the manufacture of explosives etc.

(chemistry) Any acid that contains at least one atom of hydrogen. / (industrial) hydrofluoric acid.

(chemistry) an unstable acid, HClO₂, known only in solution or as its salts, the chlorites; it is a strong oxidizing agent

(inorganic chemistry) The acid H₂As(=O)OH. / (organic chemistry) Any hydrocarbyl derivative of this acid.