1. The quality improver can improve the complex metal ions, pH value and ionic strength of food, thereby improving the binding force and water holding capacity of food. China stipulates that it can be used for cheese with a maximum usage of 5 g/kg; the maximum usage of 3.0 g/kg in Western-style ham, meat, fish, shrimp and crab; and 0.5 g/kg in canned, juice, beverage and dairy products.

2. Used as softener and detergent in chemical industry, textile industry, printing and dyeing industry, paper making industry, power generation industry, boiler scale inhibitor, softener in paper dyeing industry, acid-alkalinity buffer of adhesives for waxed paper production, fixing agent in printing and dyeing, mercerizing enhancer of fabrics, brittleness inhibitor in line making industry. Metallurgical industry is used as chemical degreasing and decontamination, and as an excellent accelerator in photographic development solution. Dental detergent and bottle detergent. Coagulant for rubber latex. Sugar juice purifier. Phosphates play an important role in improving the quality of food processing, such as maintaining the water holding capacity of meat and enhancing the binding force in meat products, in order to reduce the loss of nutrients in meat and preserve the tenderness of meat. It is also used as emulsifier, nutritional supplement and quality improver in food processing. It is a raw material for preparing noodles and edible alkali water. It is also used for sugar refining and the manufacture of alpha-starch. It is also used as a detergent for food bottles, cans, etc.