Sodium Tripolyphosphate STPP is used in detergent industry, food industry and metal industry and pharmaceutical industry
1) Used as one of the main auxiliaries for synthetic detergent, synergist for soap, water softener, tanning agent for leather making, auxiliary for dyeing. Sodium Tripolyphosphate is used in food industry, detergent industry, metal industry and pharmaceutical industry
2) As an effective dispersion agent for suspension solutions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.
3) as an oil contamination resistance agent in paper production.
4) In foodstuff industry sodium tripolyphosphate is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans.
5) It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean.
6) Sodium tripolyphosphate may also serves as a softener or densifier in foodstuff industry.
Property | Specification |
Chemical Formula | Na₅P₃O₁₀ |
CAS No. | 7758-29-4 |
Molecular Weight | 367.86 g/mol |
Appearance | White crystalline powder or granules |
Purity | ≥94% (Technical Grade) |
pH (1% Solution) | 9.5–10.5 |
Solubility | Highly soluble in water (14.5 g/100 mL, 25°C) |
Bulk Density | 0.7–1.0 g/cm³ |
Loss on Drying | ≤0.7% |
Storage Conditions | Cool, dry place; avoid moisture and heat |
Applications | Detergents, water treatment, food preservative, industrial cleaners |

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