Sodium triphosphate (STP), also sodium tripolyphosphate (STPP), or tripolyphosphate(TPP),[1]) is an inorganic compound with formula Na5P3O10. 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. Environmental problems associated with eutrophication are attributed to its widespread use.[2]
https://en.wikipedia.org/wiki/Sodium_triphosphate
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