(organic chemistry) A white crystalline dicarboxylic acid, C₄H₈(COOH)₂; it has many industrial applications; when condensed with hexamethylene diamine it produces nylon.

(organic chemistry) A clear colourless organic acid, CH₃COOH, formed by the bacterial oxidation of ethanol through acetic fermentation; it is used as a solvent and has very many industrial applications; it is the major acidic component of vinegar.

(inorganic chemistry) A corrosive colourless liquid, HBrO₃; it is a powerful oxidizing agent, and is used in the manufacture of pharmaceuticals and some dyes; it reacts with bases to form bromates.

(organic chemistry) 2-methyl-propanoic acid, (CH₃)₂CHCOOH, an isomer of butyric acid, that occurs in carob beans and croton oil.

(organic chemistry) A very-long-chain saturated fatty acid, CH₃(CH₂)₂₄COOH, found in beeswax and carnauba wax.

(inorganic chemistry) A poisonous, white crystalline compound, H₃AsO₄, formed from arsenic pentoxide and water; it has the same structure as phosphoric acid, and is used in the manufacture of arsenates.

(dated, organic chemistry) phenol (C₆H₅OH)

any of the steroid acids produced by the liver, such as cholic acid, that occur in bile as sodium salts and serve to neutralize the contents of the stomach as they enter the duodenum and to aid the emulsification and absorption of fats

(organic chemistry) amino-formic acid, NH₂COOH; it is too unstable to have been isolated, but its esters and salts are known.

(organic chemistry) A fatty acid, CH₃(CH₂)₆COOH, obtained from butter and other animal fats, and used in the manufacture of perfumes and flavours.