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Sodium Tripolyphosphate (STPP)
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Synonyms: Pentasodium triphosphate; Sodium triphosphate; STPP
Chemical formula: Na5P3O10
Molecular Structure:
Molecular weight: 367.86
Standard executed: GB/T9983-2004(industrial grade)/QB1034-91(food grade)
Applications: Sodium Tripolyphosphate is used for the main accessory ingredient of synthetic detergent, synergist of soap, water softener in industry and so on.
Package and storage: Outer woven bags with inner plastic lining, paper 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 |
Main content (as Na5P3O10) %> |
94.0 |
94.0 |
|
2 |
Phosphorus pentoxide %> |
57.0 |
57.0 |
|
3 |
Water insoluble %< |
0.15 |
0.05 |
|
4 |
Fe %< |
0.01 |
0.01 |
|
5 |
PH value of 1% solution |
9.2-10.0 |
9.5-10.0 |
|
6 |
Heavy metal (as Pb) %< |
|
0.001 |
|
7 |
Arsenic (as As) %< |
|
0.0003 |
|
8 |
Fluoride (as F) %< |
|
0.003 |
|
9 |
Granularity General powder
16sieving%>
35sieving%>
100sieving%>
Furfurescence 100sieving%> |
95.0
90.0
40.0
90.0
|
95.0
90.0
40.0
90.0
|
|
10 |
Degree of whiteness %> |
90.0 |
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