Sodium Tripolyphosphate (STPP) CAS NO.

Item	Standard	Result
Content（Na5P3O10）%≥	94.0	95.0
Phosphorus pentoxide %≥	57.0	57.6
Water-insoluble %≤	0.05	0.04
Iron（Fe） %≤	0.01	0.007
PH value（1% water solution）	9.5-10.0	9.8
Heavy metal (Pb) %≤	0.001	0.0006
Arsenic (As) %≤	0.0003	0.0002
Fluoride (F) %≤	0.003	0.003
White content %≥	85.0	90.0

(1) STPP/Sodium Tripolyphosphate is used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing;

(2) STPP/Sodium Tripolyphosphate can also used as an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.;

(3) STPP/Sodium Tripolyphosphate as an oil contamination resistance agent in paper production.

(4) In foodstuff industry, STPP/Sodium Tripolyphosphate is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans.

STPP/Sodium Tripolyphosphate may tender the meat in canned ham and soften the skin of horse bean in canned horse bean.

STPP/Sodium Tripolyphosphate may also serves as a softener or densifier in foodstuff industry.

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