Sodium Tripolyphosphate is inorganic compound. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. It is produced on a large scale as a component of many domestic and industrial products, especially detergents. 

Sodium Tripolyphosphate is a preservative for seafood, meats, poultry, and animal feeds. It is common in food production. In foods, sodium tripolyphosphate used as emulsifier and to retain moisture.