Sodium tripolyphosphate (STPP)
Chemical formula: Na5P3O10
CAS No: 7758-29-4
Other name: Tripolyphosphate
Molecular weight: 367.86
Classification: Other Inorganic SaltsStandard executed: HG/T3266-2002
Properties: white powder
apparent density:0.35-0.90g/ml
melting point: 622degree, easily dissolving in water; water solution is alkaline(PH value of 1% solution is 9.7); can hydrolyze into phosphate in water, has good ability in complexing metal ions,; can be used to soften water; has some surfactant properties.
Technical Specifications:
|
Specifications |
Superior quality |
First-grade |
Qualified products |
|
Sodium Tripolyphosphate(Na5P3O10)% ≥ |
94 |
90 |
80 |
|
Phosphorus Pentoxide(P2O5)% ≥ |
57.0 |
56.0 |
55.0 |
|
Water insoluble matter %≤ |
0.10 |
0.10 |
0.15 |
|
Fe%≤ |
0.007 |
0.015 |
0.030 |
|
PH |
9.2--10.0 |
|
Whiteness %≥ |
90 |
80 |
70 |
|
Apparent density |
5.0 |
Application: mainly used as syndet adjuvant, soap synergist and prevent bar soap from oiling off and blooming; has strong emulsification on lubricant and oils and fats, can be used to adjust the PH value of buffer soap solution; can be used as water softener for industrial water, pretanningagent and dyeing adjuvant; drilling mud dispersant; dispersant in preparing suspension in paint, kaolinite, magnesium oxide, calcium carbonate etc.; oil-proofing agent and antifoulant in paper industry.
Packing: n.w. 25kgs/50kgs/1,000kgs plastic-lined woven bags.
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