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Sodium Tripolyphosphate (STPP)

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category：Industrial application
Properties: White powder or fine particles, easily soluble in water, and its aqueous solution is alkaline.
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Sodium Tripolyphosphate (STPP)

Sodium Tripoly Phosphate

Chemical formula: Na5P3O10

Molecular weight: 367.88

CAS No.: 7758-29-4

Executive standard: GB/T9983-2004 (industrial grade)

Properties: White powder or fine particles, easily soluble in water, and its aqueous solution is alkaline.

Uses: Used as main auxiliaries for synthetic detergents, soap synergists, pre-tanning agents for leather making, water softeners for industrial water; effective dispersants for suspension treatment of paints, aged soil, magnesium oxide, calcium carbonate drilling mud, etc.; Papermaking is used as a grease repellent.

Packing: inner plastic outer woven, net weight 25Kg, 50Kg, 1000Kg per bag, stored in a ventilated and dry place.

[Table unit: %]

Serial number  Indicator name    National standard  Internal control index 
1  Appearance    White powder or particle 
2  Main content (calculated as Na5P3O10)  ≥  96  96.4 
3  Phosphorus pentoxide  ≥  57  57.7 
4  Water insoluble  ≤  0.1  0.05 
5  Iron (Fe)  ≤  0.007  0.001 
6  PH (1% water soluble)    9.2-10.0 
7  Heavy metals (in Pb)  ≤  /  0.001 
8  Arsenic (in As)  ≤  /  0.003 
9  Fluoride (in F)  ≤  /  0.001 
10  Ordinary powder with particle size  ≥  95 
90 
40 
90 		 95 
90 
40 
90 
16 mesh sieving quantity 
35 mesh sieving quantity 
100 mesh sieving quantity 
100 mesh sieving amount of fine powder 
11  Whiteness  ≥  90  90 
Keyword:
water
powder
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Sodium Trimetaphosphate (STMP)
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Sodium Hexametaphosphate (SHMP)

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