(inorganic chemistry) An unstable acid, H₂S₂O₃, formally derived from sulfuric acid by the substitution of a sulfur atom in the place of an oxygen one; it is known only in solution or as its salts and esters, the thiosulfates.

(chemistry) A triterpenoid organic acid that is found in Pistacia resin.

(inorganic chemistry) HIO₄ or H₅IO₆, the oxyacids of iodine in which iodine has the highest oxidation number; H₅IO₆ is a white crystalline substance (HIO₄ is not stable), and both are strong oxidizing agents.

(organic chemistry) an aliphatic dicarboxylic acid, (CH₂)₈(COOH)₂, originally prepared from tallow; it is used in the manufacture of resins, plasticizers and polyester rubbers

(inorganic chemistry) An unstable, highly volatile, poisonous acid, HOCN, used to prepare cyanates; hydrolyzes in water to give ammonia and carbon dioxide

(chemistry) Any electrophylic compound that can accept a pair of electrons and form a coordinate covalent bond.

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

(chemistry) a dicarboxylic acid, HOOC(CH₂)₃COOH, formed during the catabolism of tryptophan

(organic chemistry) A colourless syrupy organic compound, CH₂OH.CHOH.COOH, formed by the oxidation of glycerol or glyceraldehyde.

(chemistry) a solution of hydrogen iodide, HI, in water; it is a strong acid and reducing agent