Sodium tripolyhosphate(STPP)

Molecular Formula: Na5P3O10

Molecular weight: 367.86

Standard: GB9983-88

Properties:
White microdot powder with luster, melting point at 622, easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+ ,Mg2+ ,can soften hard water, change suspension into solution, alkalescent, without corrosiveness.

Technical specification:

Index name

Industrial grade

Food grade

Phosphorus pentoxide(P2O5) %≥

57

57

Water insoluble %≤

0.1

0.05

Iron %≤

0.015

0.01

PH value(1% aqueous solution)

9.2-10.0

9.5-10.0

Fluoride(based on F) %≤

 

0.003

Arsenic %≤

 

0.0003

Heavy meta %≤

 

0.001

Main content %≥

94.0

94.0

Chlorine %≤

 

0.025

Use: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used in epuration of petroleum product, gum latex storage, as dispersant, solvent in metal industry and pharmaceutical industry, also widely used in gum synthesis, foodstuff industry, and poultry process.

Packing:woven bag lined with plastic bag, net weight: per bag.25kg 50kg 1000kg

Storage: Avoid moisture, should not be put in the open air.

 

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