Title: Dihydroxymaleic Acid
CAS Registry Number: 526-84-1
CAS Name: (Z)-2,3-Dihydroxy-2-butenedioic acid
Additional Names: 1,2-dihydroxyethylenedicarboxylic acid
Molecular Formula: C4H4O6
Molecular Weight: 148.07
Percent Composition: C 32.45%, H 2.72%, O 64.83%
Literature References: Prepn from tartaric acid: Fenton, J. Chem. Soc. 87, 811 (1905); Nef, Ann. 357, 291 (1907).
Properties: Plates from water, usually crystallizes as the dihydrate. The anhydr acid dec 155° without melting. Slightly sol in cold water, ether, acetic acid; more sol in alcohol. Aq solns are unstable.
Use: In the detection of fluorides and of titanium. Has been proposed as antioxidant for frozen foods.