Sodium Tripolyphosphate

Sodium Tripolyphosphate (STPP)
CAS No: 7758-29-4
Molecular Formula: Na5P3O10
Molecular Weight: 367.86
Melting Point: 622℃
Apearance: White or colorless crystal powder.
1. Sodium Tripolyphosphate(Industrial Grade)

Na5P3O10	94.0%Min
P2O5	: 57.0%Min
Water Insoluble Matter	0.15%Max
Iron (Fe)	0.012%Max
PH Value (1% water solution)	9.1-10.0
Whiteness	90%Min
Ignition Loss	1.0
Density (g/cm3)	0.35-0.9
Phase I	10-30

2. Sodium Tripolyphosphate(Food Grade)

Na5P3O10	94.0%Min
P2O5	57.0%Min
Water Insoluble Matter	0.04%Max
Iron (Fe)	0.006%Max
PH Value (1% water solution)	9.5-10.0
Heavy Metal(as Pb)	0.001%Max
Arsenic(As)	0.0003%Max
Fluoride(F)	0.003%Max
Whiteness	95%Min
Density (g/cm3)	0.35-0.9
Phase I	10-30

3. Sodium Tripolyphosphate(Ceramics Grade)

Na5P3O10	96.52%Min
P2O5	57.85%Min
Water Insoluble	0.10%Max
Fe	0.007%Max
PH	9.7

Usage:
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

Resource:

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