Sodium Tripolyphosphate (STPP)

Wintersun code:19-053
CAS Number:7758-29-4
Molecular Formula:Na5P3O10
Molecular Weight:367.86


The alkaline phosphates offer detergency activity in combination with the properties of sequestration, dispersion and buffering ability. STPP is used in water softening, industrial cleaners, food uses, detergent, emulsifier of oil and grease, peptizing agent, deflocculating agent in oil well, sequester in cotton boiling.

Food Grade Kosher/FCC Grade

WC Code: 19-053-01

  Sales Specification

pH(1% Solution): 9.2-10.2
Phosphate as P2O5: 56% min
Fluoride as F: 10.0 ppm max
Arsenic as As: 3.0 ppm max
Lead as Pb: 2.0 ppm max
Cadmium as Cd: 1.0 ppm max
Mercury as Hg: 1.0 ppm max
Heavy Metal as Pb: 10.0 ppm max


In 55.12LB Bag, 35 bags per pallet 

Sodium Tripolyphosphate Medium Dense

WC Code: 19-053-02

  Sales Specification

Appearance: White Powder
Na5P3O10: 94% Min
P2O5: 57% Min
Water Insoluble: 0.10% Max
pH (1% solution): 9.2~10
Whiteness: 90% Min
Bulk Density: 0.80~0.90 g/cm3


In 50lb Kraft paper bag, 44bags per pallet  

Sodium Tripolyphosphate Light 

WC Code: 19-053-03

  Sales Specification

Appearance: White Granular
Na5P3O10: ≥94.0% min
P2O5 Content: 57% min
Water Insoluble: ≤0.10%
Bulk Density: 0.50-0.60
pH(1% soluble in water): 9.2-10
Whiteness: ≥90%


In 50lb Kraft paper bag, 26bags per pallet