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Sodium Tripolyphosphate(STPP)

Detail

Chemical formula: Na5P3O10
Property: White particle or powder, appearant density 0.35-0.90g/cm3, melting point 622℃. Easily soluble in water, aqueous solution is alkali. Hydrolyze to orthophosphate in water, complexing with calcium, magnesium, iron and other metal ions and generate soluble complex. As inorganic surfactant, it has certain properties of organic surfactants.
Packing  instruction: Paper bag or PP-PE bag, Net weight 25kg, 50kg 1000kg per bag, or based on the customers' requirements.
Executive standard: GB/T 9983-2004
Quality standard:

Item

Index

Superior

Grade I

Grade II

  Whiteness /% ≥

90

85

80

  phosphorus pentoxide (P2O5)/% ≥

57

56.5

55

  Sodium Tripolyphosphate (Na5P3O10)/% ≥

96

90

85

  Water insoluble matter/% ≤

0.1

0.1

0.15

  Iron (Fe)/% ≤

0.007

0.015

0.03

  pH value (1% solution)

9.2-10.0

  Granularity

Passes 1.00mm test, sieving rate is higher than 95%


Usage: Used as additive in detergent synthesis, ceramics production, soap synergist. Has strong emulsifying property to lubricant and fat, to adjust the PH value of buffer liquid soap, water softener for industrial water, pretanning agent for leather production, in dyeing additive, paint, kaolin, magnesium oxide, calcium carbonate and other industries as dispersant for the preparation of suspension, as dispersant in drilling fluid, as anti-oil agent in paper-making industry.    

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