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..