Sodium tripolyphosphate (STPP)
Typical specification
Item | Standard |
Appearance | White powder or granular |
Na5P3O10, % | 94min |
P2O5, % | 57min |
Water insoluble matter, % | 0.1max |
Iron (Fe), % | 0.015max |
PH value (1% water solution) | 8-10 |
Whiteness, % | 90min |
Phase I | 10-30 |
Bulk Density, g/cm3 | 0.55-0.75 |
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