(organic chemistry) A white crystalline organic acid, C₆H₅COOH; the simplest aromatic carboxylic acid; used as a food preservative and in many other industrial applications.

(inorganic chemistry) A relatively unstable form of chromic acid, H₂Cr₂O₇, known only in solution or as its salts, the dichromates, from which it may be prepared.

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

A weak unstable acid, H₂CO₃, known only in solution, and as carbonate salts; it is present in carbonated drinks, and sparkling wine, but decomposes to form carbon dioxide and water.

(dated, organic chemistry) phenol (C₆H₅OH)

(organic chemistry) A fatty acid, CH₃(CH₂)₈COOH, obtained from animal fats, and used in the manufacture of perfumes and flavours.

(organic chemistry) A colourless crystalline dicarboxylic acid, (CH₂COOH)₂, that occurs naturally in amber and is important in the metabolic Krebs cycle.

(chemistry) H₃BO₃; B(OH)₃; a white crystalline solid, soluble in hot water to form a weak acid. Used as a mild antiseptic, flame retardant, insecticide, and in the manufacture of borax and other borate salts.

(biochemistry) A white crystalline organic compound, C₆H₈O₆, found in citrus fruits and many vegetables; it is an antioxidant and an efficient scavenger of free radicals.

(organic chemistry) A colourless liquid unsaturated organic acid, CH₂=CHCOOH; used as a monomer in the production of acrylic resins; forms acrylate esters by combination with alcohols.