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Sodium Tripolyphosphate (STPP)

KASEL Chemicals

Synonyms: Sodium triphosphate; Triphosphoric acid, pentasodium salt; Sodium Phosphate Tripoly; STPP; Pentanatriumtriphosphat (German).

Sodium tripolyphosphate is the sodium salt of triphosphoric acid. Is a white odourless powder, produced commercially by reaction of phosphoric acid with sodium carbonate. Sodium tripolyphosphate provides a number of chemical functions to improve the efficiency of cleaning products. This includes the sequestration of hardness ions, buffered alkalinity, deflocculating of dirt particles and anticredeposition of soil. Food-grade qualities are used in many food applications.

General information

Chemical formula:  Na5P3O10 Rel. mol. weight : 367.86 CAS No.:  7758-29-4  EINECS No.:  231-838-7

Melting point: 620 °C Boiling point: Decomposes over 600 °C Water solubility (20 °C):  150 g/l Density (20 °C):  2.52 g/cm3

Applications
Sodium Tripolyphosphate is used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used in epuration of petroleum product,  solvent in metal industry and pharmaceutical industry, also widely used in gum synthesis, foodstuff industry, and poultry process.

Storage regulations
Store in a cool, dry and well-ventilated area away from excess heat and flame.

Specification
(Here you can download Specification as PDF-Files.)

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