【Scientific Name】2,3-Dihydroxybutanedioic acid
【Molecular Formula】C₄H₆O₆
【Structural Formula】

【Molecular Weigh】150.09
【CAS Number】133-37-9
【Character】Colorless crystals or white powder, without odor, with sour taste, stable in air, compound of equal quantity of dextrorotatory and levorotatory tartaric acid, containing one or two molecule crystalline water and losting water when heated to 100°C, specific gravity 1.697. Its solubility in water is 20.6%,in ether is about 1% and 5.01% in ethanol.

【Specifications】GB15358-94(Food grade)

GB15358-94
Item	Index
	monohydrate	anhydrous
Content ≥%	99.5	99.5
Melting Point°C	200~206	200~206
Sulphate(SO4) ≤%	0.04	0.04
Heavy metals (Pb) ≤%	0.001	0.001
Arsenic (As)≤%	0.0002	0.0002
Oxidizable matter	Passed	Passed
Loss on drying ≤%	11.5	0.5
Residue on ignition(Ash) ≤%	0.10	0.10

【Uses】This product is widely used in trades such as foodstuff,medicine,chemical industry and light industry etc. ,and is chiefly used to make the tartaric acid salts , like antimony potassium tartrate, potassium sodium tartrate . Served as beer vesicant and foodstuff sourness agent and flavoring etc at the foodstuff trade and its sourness is the citric acid 1.3 times , and especially is suitable to do the sourness agent of the grape juice. This article is appraised as the excellent food additive by the FAO/WHO experts committee . It also has the very important effect in tannage, photograph , glass, enamel and telecommunication equipment etc.。
【Packing】25kg complex bag