Product Name: STPP; Sodium Tripolyphosphate; Sodium Tripoly Phosphate;
Chemical formula: Na5P3O10
Molecular weight: 367.86
CAS No.: 7758-29-4
Detailed introduction to STPP(Sodium Tyipolyphosphate):
Appearance: White microdot powder with luster;
Melting point: 622 degree centigrade;
Solubility: Easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+, Mg2+;
Standard executed: GB9983-88
Specification:
|
Index |
Technical Grade |
Food Grade |
|
Main content |
94.0% min. |
94.0% min. |
|
P2O5 |
57.0% min. |
57.0% min. |
|
Water insoluble |
0.1% max. |
0.05% max. |
|
Iron, as Fe |
0.015% max. |
0.01% max. |
|
pH of 1% water solution |
9.2-10.0 |
9.5-10.0 |
|
Density(g/cm 3 ) |
0.8-1.0 |
0.8-1.0 |
|
Heavy metal, as Pb |
- |
0.001% max. |
|
Arsenic, as As |
- |
0.0003% max. |
|
Fluoride ,as F |
- |
0.003% max. |
|
Chloride, as Cl |
- |
0.025% max. |
Application:
1. Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, as dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, and as preservative agent for paper making, organic synthesis catalyzer;
2. Used in epuration of petroleum product, gum latex storage, as dispersant, solvent in