Sodium tripolyphosphate
STPP
Sodium tripolyphosphate (STPP)| Molecular Formula | Na2p3O10 |
| CAS No. | 7758-29-4 |
| EINECS No. | 231-838-7 |
| Appearance | Powder/granule |
| P2O5 | 65% min |
| Na5P3O10 | 855 min |
| Water insoluble | 0.1% max |
| Bulk density | 0.4-0.8g/cm3 |
| PH (1% water solution) | 9.2-10.0 |
| Heavy Metal (Pb) | 10ppm max |
| Lead | 4ppm max |
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