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Sodium Tripolyphosphate
STPP
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CAS No.: 13573-18-7; 7758-29-4
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Molecular Formula: Na5P3O10
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| Synonyms: Pent-sodium Phosphate | Molecular Weight: 367.86 |
Properties & Usage:
Food grade Sodium Tripolyphosphate STPP is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. STPP may also serves as a softener or densifier in foodstuff industry.
Technical grade Sodium Tripolyphosphate STPP is used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispesing agent for suspension solutions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; As an oil contamination resistance agent in paper production.
Specification:
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Items |
Index |
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Food grade |
Technical grade |
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Appearance |
White powder, granular or flakes |
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Na5P3O10 % |
95.0 min |
94.0 min |
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P2O5 % |
57.0 min |
57.0 min |
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Water insoluble matter % |
0.05max |
0.1 max |
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Iron(Fe) % |
0.01 max |
0.01 max |
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pH value(1%water solution) |
9.5-10.0 |
9.2-10.0 |
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Heavy Metal (as Pb) % |
0.001 max |
--- |
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Arsenic (As) % |
0.0003 max |
--- |
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Fluoride (F) % |
0.003 max |
--- |
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Whiteness % |
85 min |
85 min |
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Package:
25KG/BAG, 50KG/BAG, 1000KG/BAG