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Sodium Tripolyphosphate(STPP) Molecular formula: Na5P3O10 Molecular Weight: 367.86 Standard executed: GB/T9983-2004(technical grade) QB1034-91(food grade) CAS Number: 7758-29-4 Uses: 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 dispersion agent for suspension solutions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; As an oil contamination resistance agent in paper production. In foodstuff industry 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 in canned horse bean. It may also serves as a softener or densifier in foodstuff industry. Guaranteed Technical Specifications: Specifications---------------------Industrial Grade AssayNa5P3O10 % -----------------------≥ 94.0 P2O5 % --------------------------------≥ 57.0 Sodium Pyrophosphate %-----------------≤ 3 Sodium Sulphate ---------------------≤ 2.0 Water Insoluble Matter %---------------≤ 0.1 Iron(Fe) %-----------------------------≤ 0.01 PH value(1%water solution)-------------9.2-10.0 Heavy Metal (as Pb) %-------------------≤ - Arsenic (As) %--------------------------≤ - Fluoride (F) %--------------------------≤ - Particle Size Power: (ASTM)Through 200 mesh sieve %---------≥ 75 Through 100 mesh sieve %---------------≥ 90 Whiteness %----------------------------≥ 100.0 Density-------------------------------0.7-1.000 kg/lt Phase I -------------------------------10-30 Packing and storage: In 25Kg, 50 Kg, 1000 Kg bage. Store at a cool, dry and well ventileated place.
Item | Standard No | Exact No |
Sodium Tripolypyosphate(Na5P3O10),%≥ | 90.0 | 94.0 |
Phosphate(base on P2O5) ,%≥ | 56.5 | 57.3 |
Insoluble substance in water,%≤ | 0.10 | 0.07 |
PH value | 9.2-10.0 | 9.4 |
Whiteness,≥ | 85.0 | 90 |
Fe,%≤ | 0.015 | 0.009 |
Sodium Tripolyphosphate(STPP)