A crystalline organic acid, the trans-isomer of C4 H4 O4 , found in various plants and produced synthetically and used mainly in resins, paints, varnishes, and inks, and as a flavoring and a mordant.
A colorless, crystalline, unsaturated organic acid, HOOCCH:CHCOOH, occurring in various plants or produced synthetically from maleic acid: used in making resins, as a stabilizer for foods, etc.
A colorless crystalline compound found in various plants and produced synthetically. It is used mainly in resins, paints, varnishes, and inks. Fumaric acid is a geometric isomer of maleic acid, having two carboxyl (COOH) groups attached on opposite sides of an ethylene chain. Chemical formula:C4H4O2.
From New Latin Fūmāriagenus of herbaceous plants (from Late Latin fūmāriafumitory) (from Latin fūmussmoke) –ic
American Heritage Dictionary of the English Language, 5th Edition
Fumaric-acid Sentence Examples
It forms deliquescent crystals, which are readily soluble in alcohol and melt at ioo° C. When heated for some time at 130° C. it yields fumaric acid (q.v.), and on rapid heating at 180° C. gives maleic anhydride and fumaric acid.
Consequently, of each pair of isomers we may establish beforehand which is the more stable; either in particular circumstances, a direct change taking place, as, for instance, with maleic acid, which when exposed to sunlight in presence of a trace of bromine, yields the isomeric fumaric acid almost at once, or, indirectly, one may conclude that the isomer which forms under greater heat-development is the more stable, at least at lower temperatures.
Pollak, Monats., 18 94, 15, p. 469); by heating a solution of desoxalic acid; by the oxidation of fumaric acid with potassium permanganate; by the action of silver oxide on dibromosuccinic acid,`.!
Fumaric acid esters (II) differ from Fumaric acid by chemical groups called ' esters ' .
It may be prepared by heating racemic acid (see TARTARIC Acid) with fuming hydriodic acid; by heating fumaric acid (q.v.) with water at 150-200Ã‚° C.; by the action of nitrous acid on inactive aspartic acid; and by the action of moist silver oxide on monobromsuccinic acid.