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Sodium Tripolyphosphate (STPP)
CAS number:7758-29-4
Molecular formula:
Molecular weight:
Customs code:28353190.00
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Specifications 

Item 

Standard 

Purity (Na5P3O10, %) 

94 MIN

P2O5 % 

56.5 MIN

Iron (Fe) % 

0.015 MAX

Color (Whiteness) 

90 MIN

Bulk Density (g/cc) 

0.85-1.00

Insoluble in Water % 

0.10 MAX

pH (1% Solution) 

9.0-10.2

Phase I % 

10-40

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