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olecular formula------Na5P3O10

Molar mass------367.864 g/mol

Appearance------white powder

Density------2.52 g/cm3

Melting point------622 Celsius degree

Solubility in water------14.5 g/100 ml (25Celsius degree)

Sodium tripolyphosphate (STPP, sometimes STP or sodium triphosphate or TPP), with formula Na5P3O10, is a polyphosphate of sodium. It is the sodium salt of triphosphoric acid.It is used in various applications such as a preservative for seafood, meats, poultry and pet foods. It is also used in toothpaste and as a builder in soaps and detergents, improving their cleansing ability.