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Sodium Tripolyphosphate (STPP)
White powder, Melting point 622° C, Easily soluble in water. It has got salient chelating capacity to ions of Ca and Mg etc. And can soften hard water to make suspension solution become into clear solution, It has got weak alkalinity but no corrosiveness. It is a surfactant, and has got outstanding emulsification to lubricants and fat.
Application: It 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 incanned horse bean. It may also serves as a softener or densifier in foodstuff industry. It must be prevented from Dampness and water. Do not store it in the open air.
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| Indexes | Industrial Grade | Food Grade |
| Assay Na5P3O10 % ≥ | 94.0 | 94.0 |
| P2O5 % ≥ | 57.0 | 57.0 |
| Water Insoluble Matter % ≤ | 0.15 | 0.05 |
| Iron(Fe) % ≤ | 0.01 | 0.01 |
| PH value (1% water solution) | 9.2-10.0 | 9.5-10.0 |
| Heavy Metal (as Pb) % ≤ | 0.001 | |
| Arsenic (As) % ≤ | 0.0003 | |
| Fluoride (F) % ≤ | 0.003 | |
| Particle Size Through 16 mesh sieve % ≥ Through 35 mesh sieve % ≥ Trough 100 mesh sieve % ≥ | 95 90 40 | 95 90 40 |
| Whiteness % ≥ | 90 | 90 |
STPP (Sodium Tripolyphosphate) Food Grade
