Sodium tripolyphosphate CAS 7758-29-4
Sodium tripolyphosphate, also known as pentasodium phosphate, sodium pyrometaphosphate, STPP, pentasodium tripolyphosphate. White powdery crystal, good fluidity, relative molecular weight 367.Chemicalbook 86, melting point 622℃, easily soluble in water, and its aqueous solution is alkaline. It is commonly used in food as moisture retention agent, quality improver, pH regulator, and metal chelating agent.
item | value |
Product | Sodium Tripolyphosphate |
Purity | 94.00% min |
P2O5 | 57.0% min |
Fluoride(F) | 50ppm max |
Arsenic(As) | 3ppm max |
Heavy Metal(Pb) | 10ppm max |
Chloride(CI) | 0.025% max |
Sulfate(SO4) | 0.4% max |
Water insoluble | 0.05% max |
PH | 9.5-10 |
Whiteness | 85% min |
Phase I | 10-60% |
Appliation:
1) Technical grade: Used in such industries as oil field, paper-making,
textile, dyeing, petrochemical industry, tanning industry,
metallurgical industry and building material industry,
and used as a water softening agent in solution for printing,
dyeing, and boiler, as diffusant in papermaking; Retarding agent,
floating agent, dispersing medium, high temperature
agglomerant, detergent and soil analytical chemical reagent;
2)Food grade: Mainly used as additive agent, pH adjusting agent,
fermenting agent, and nourishment, etc.
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