Sodium Tripolyphosphate (STPP) is a versatile inorganic compound extensively used as a builder in detergents and as a preservative in food products. It functions as a water softener by chelating calcium and magnesium ions. In the food industry, STPP is used to retain moisture in seafood and meat products, improving texture and extending shelf life. It is one of the most widely used phosphates globally.
CAS:
7758-29-4
Formula:
Na5P3O10
Molar Weight
367.86 g/mol
Melting Point
622°C (1152°F)
Boiling Point
Not applicable (decomposes)
Density
2.52 g/cm³
Forms
White powder or granules, Anhydrous and hexahydrate forms available
