Sodium tripolyphosphate is an inorganic substance, with chemical formula of Na₅P₃O₁₀. It is a kind of amorphous water-soluble linear polyphosphate. It is commonly used in food and can be used as water retention agent, quality improver, PH regulator and metal chelating agent.

Sodium tripolyphosphate, as a food additive, can be used in fruits and vegetables to reduce the toughness of the outer skin and soften the bean skin in the production of broad bean cans. It can also be used for milk and dairy products, frozen drinks, nuts, cocoa and chocolate products, wheat flour and its products, baked food, puffed food, canned aquatic products, cooked meat products, such as the curing of ham raw meat. There are also cooked packaged chicken breast meat that people who want to lose weight like to eat. Some products also contain food grade sodium tripolyphosphate.

The purpose of adding sodium tripolyphosphate to frozen chicken wings is to keep the wings longer.

Chuandong Chemical Group is specialized in producing food grade sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate.