Synonyms: Sodium Polyphosphates, Glassy; Sodium Tetrapolyphosphate; Graham's Salt, SHMP
Chemical formula: (NaPO3)6
Molecular weight: 611.82
Standard executed: HG/T2837-1997
Properties: White powder, specific gravity is 2.484(20centigrade), and easy to dissolve in water and not dissolve in organic solution and can react with many metal hydronium of Ca, Ba, Mg, Cu, Fe, etc to become soluble compound.
Applications: Used as the water softener, buffer, flotation agent, dispersing agent in the industry of oil field, paper-making, weaving, dyeing, petroleum, chemicals, leather, metallurgy, etc. and also used as additive, trophic agent, amendment, PH value modifying agent, etc in food industry.
Package and storage: Plastic-woven sack with polythene inner bag, net weight per bag is 25kg,50kg and 100kg. keep in dry and windy conditions.
Technical Specifications:
No. |
Standard name |
Industrial grade |
Food grade |
1 |
Total phosphate(as P2O5)%MIN |
68.0 |
68.0 |
2 |
Non-active phosphate(as P2O5)%MAX |
7.5 |
7.5 |
3 |
Fe %MAX |
0.05 |
0.05 |
4 |
PH value |
5.8-7.3 |
5.8-6.5 |
5 |
Solubility |
qualified |
qualified |
6 |
Heavy metal(as Pb)%MAX |
0.001 |
|
7 |
Arsenic(As)%MAX |
0.0003 |
|
8 |
Fluoride(as F)%MAX |
0.003 |
|
9 |
Water insoluble %MAX |
0.05 |
0.05 |
10 |
Degree of polymerization |
9-21 |
9-21 |