Nomenclature
CAS number: 526-84-1
(
Z)-2,3-Dihydroxy-2-butenedioic acid; 1,2-dihydroxyethylenedicarboxylic acid.
C
4H
4O
6; mol wt 148.07.
C 32.45%, H 2.72%, O 64.83%.
Description and 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.