As an antioxidant added to food, it can give food a sour taste. The largest use of tartaric acid is as a beverage additive. It is also the raw material of pharmaceutical industry. In the mirror industry, tartaric acid is an important additive and reducing agent, which can control the formation rate of silver mirror and obtain a very uniform Chemicalbook coating. Used as biochemical reagent, masking agent and beer foaming agent, also used in tanning industry. L(+) -tartaric acid is widely used as a souring agent in beverages and other foods, including wine, soft drinks, sweets, breads, and certain gelatinous sweets. It is mainly used as sour agent, separation agent and pharmaceutical raw material.