Sodium tripolyphosphate (STPP) is an inorganic compound, component of many domestic and industrial products because of its chelating, emulsifying and preservative properties.
Major production of STPP is used in manufacture of commercial detergents where it serves as a water softener. In food, STPP is a preservative for seafood, meats, poultry, and animal feeds. It is also used as an emulsifier and to retain moisture. Other uses include ceramics, leather tanning , anticaking, setting retarders, flame retardants, paper, anticorrosion pigments, textiles, rubber manufacture, fermentation, antifreeze.