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Specifications

 
Sodium Tripolyphosphate 

Specifications
STPP Sodium tripoly phosphate
Molecular Formular: Na5P3O10
CAS No.: 13573-18-7
Appearance: White powder or granular 

 
P2O5                                              57% min
Na5P3O10                                      95% min
FLUORIDE                                     10 ppm max
ARSENIC                                      3 ppm max
HEAVY METALS(as Pb)                 10 ppm max
CHLORIDE(as Cl-)                       100 ppm max
SULFATE(as SO42+)                   0.4% max
WATER INSOLUBLE MATTER       0.05% max
PH(1% aq. Soln)                       9.5-10.0
WHITENESS                              88% min