This product is widely used in food, medicine, chemical industry, light industry and other industries. For example, as a beer foaming agent, food acidity agent and flavoring agent, it is used for cool beverage, candy, juice, sauce, cold dish, fermented powder and so on. Its acid taste is 1.3 times of citric acid, especially suitable as acidity agent of grape juice. In photography, leather, glass, enamel, telecommunications equipment and other industries also have a very important role. This product is identified by FAO/WHO Expert Committee as excellent food additive. This product is in accordance with the Japanese food additive book.