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Specifications
sodium tripolyphosphate
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sodium tripolyphosphate
olecular formula------Na5P3O10
Molar mass------367.864 g/mol
Appearance------white powder
Density------2.52 g/cm3
Melting point------622 ºC
Solubility in water------14.5 g/100 ml (25 ºC)

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.