(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.

(biochemistry) Any of a group of polyhydroxy dicarboxylic acids derived from an aldose by oxidation at both terminal carbon atoms.

(chemistry) a polymeric lactone of variable composition obtained by heating tartaric acid; used to prevent precipitation in wine

(organic chemistry) Any of a class of polyhydroxy carboxylic acids derived from an aldose by oxidation of the aldehyde functional group.