Sodium tripolyphosphate CAS 7758-29-4 is an inorganic compound with the chemical formula Na5P3O10. It is an amorphous water-soluble linear polyphosphate commonly used in food as a water retention agent, quality improver, pH regulator, and metal chelating agent.

Chinese name: Sodium tripolyphosphate

Foreign name: Sodium Tripolyphosphate (STPP)

Nickname: pentasodium tripolyphosphate, sodium triphosphate, pentasodium phosphate

Chemical formula: Na5P3O10

Molecular weight: 367.864

CAS login number: 7758-29-4

EINECS login number: 231-838-7

Melting point: 622 ℃

Water solubility: easily soluble

Density: 2.52 g/cm ³

Appearance: White crystalline powder

Physical and chemical properties

Melting point: 622 ℃

Density: 2.52g/cm3

Appearance: White crystalline powder

Solubility: easily soluble in water, with alkaline aqueous solution

Purpose

Sodium tripolyphosphate has functions such as chelation, suspension, dispersion, gelation, emulsification, and pH buffering. It can be used as a main auxiliary for synthetic detergents, industrial water softeners, tanning pre tanning agents, dyeing aids, organic synthesis catalysts, pharmaceutical industry dispersants, and food additives. In addition to exporting STPP, domestic STPP consumption is mainly concentrated in the detergent industry, food, ceramics, etc.

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