D -- sodium isoascorbate, also known as sodium isovitamin C and sodium gibberellic acid, is a new biological food antioxidant, antiseptic and preservative. It can prevent the formation of carcinogen nitrosamine in pickled products and eradicate the discoloration, peculiar smell and turbidity of food and beverage. It is widely used for the preservation of meat, fish, vegetables, fruits, sprinkles, beverages and canned food. The company is a * * medium-sized first-class enterprise, with an annual sales of more than 14000 tons of isovc sodium and more than 6000 tons of isovc acid. The company's products comply with the national standard: gb8273-87 standard and American FCC (IV) standard. According to the regulations of the U.S. Food and drug administration, sodium gibberellic acid is used as a legal antioxidant