Sodium Tripolyphosphate / STPP 94%

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2, quickly delivery

Product Description
Product: Sodium Tripolyphosphate (STPP)
CAS No.: 7758-29-4
Molecular Formula: Na5P3O10
Molecular weight: 367.86

1, Properties:
White microdot powder with luster, melting point at 622 o C, easily soluble in water, with remarkable chelating ability to some metal ions such as Ca 2+, Mg 2+, can soften hard water, change suspension into solution, slightly alkaline, without causticity.

2, Usage:
1) 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, 2) Used in epuration of petroleum product, gum latex storage, as dispersant, solvent in metal industry and pharmaceutical industry,
3) also widely used in gum synthesis, foodstuff industry, and poultry process.

3, Specifications:

1) Industrial grade
Main content, %; 94.0
P2O5%≥ 57.0
Water insoluble %; 0.1
Iron, as Fe %; 0.015
pH of 1% water solution 9.2-10.0

2) Food grade
Main content, %: 94.0
P2O5%; 57.0
Water insoluble %; 0.05
Iron, as Fe %; 0.01
pH of 1% water solution 9.5-10.0
Heavy metal, as Pb %; 0.001
Arsenic, as As, %; 0.0003
Fluoride, as F, %; 0.003
Chloride, as Cl %; 0.025

4, Packing:
Plastic-woven sack with polythene inner bag; Net weight 25kg, 50kg or 1000kg; Keep away from water or moisture, do not pile up in the open air.

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