Sodium tripolyphosphate (STPP) is an inorganic compound with the chemical formula Na₅P₃O₁₀. Classified as an amorphous, water-soluble linear polyphosphate, it is widely applied in the food industry, serving as a water retention agent, quality improver, pH adjuster, and metal chelating agent.

　　As a common food additive, sodium tripolyphosphate can be used in fruits and vegetables to reduce the toughness of their outer skins, as well as to soften bean skins during the production of broad bean cans. It is also suitable for use in milk and dairy products, frozen drinks, nuts, cocoa and chocolate products, wheat flour and its derivatives, baked goods, puffed foods, canned aquatic products, and cooked meat products—such as the curing of raw ham meat. Additionally, some cooked packaged chicken breasts, a popular choice among people looking to lose weight, also contain food grade sodium tripolyphosphate.

　　When sodium tripolyphosphate is added to frozen chicken wings, its main function is to extend the shelf life of the wings.

　　Chuandong Chemical Group specializes in the production of food grade sodium tripolyphosphate, sodium hexametaphosphate, and sodium pyrophosphate.