Brief introduction of Sodium Tripolyphosphate CAS 13573-18-7
Chemical name: Sodium Tripolyphosphate
CAS No.: 13573-18-7
Synonyms: STPP
Molecular Formula: Na5O10P3
Molecuar Weight: 367.86
EINECS: 231-838-7
Properties of Sodium Tripolyphosphate CAS 13573-18-7
Sodium Tripolyphosphate is white powder or granule appearance. Mainly used as additive of synthetic detergent. Also used as water softener, pretanning agent, dyeing aid, etc. Using wet-process phosphoric acid as raw material, it was neutralized with sodium hydroxide and prepared by spray drying.
Specification of Sodium Tripolyphosphate CAS 13573-18-7
Item |
Technical Grade |
Food Grade |
Appearance |
White powder or granule |
White powder |
Na5O10P3, % |
≥94.00 |
≥95.00 |
P2O5, % |
≥57.00 |
- |
Water insoluble matter, % |
≤0.10 |
≤0.10 |
pH Value(1% solution) |
9.20 ~ 10.00 |
- |
Iron (Fe), % |
≤0.015 |
- |
Arsenic (As), mg/kg |
- |
≤3.00 |
Fluoride (F), % |
- |
≤0.005 |
Lead (as Pb), mg/kg |
- |
≤2.00 |
Application of Sodium Tripolyphosphate CAS 13573-18-7
Industry Field:
It is a tanning agent for leather making, auxiliary for dyeing. Additionally, it is used as an oil contamination resistance agent in paper production and widely use for ceramic industry.
Food Field:
Sodium tripolyphosphate 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. It may also serves as a softener or densifier in foodstuff industry.
Packing, Delivery and Storage of Sodium Tripolyphosphate CAS 13573-18-7
Package: 25kg/bag or as per customer request.
Storage conditions: Store in cool place. Keep container tightly closed in a dry and well-ventilated place.
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