STPP
Sodium Tripolyphosphate(STPP)
Chemical formula：Na5P3O10
Molecular weight：367.88
Property：White powder.
Technical Specifications：
| Index | Industrial grade | Food grade |
| Content（Na5P3O10）%≥ | 94.0 | 95.0 |
| Phosphorus pentoxide %≥ | 57.0 | 57.0 |
| Water-insoluble %≤ | 0.15 | 0.05 |
| Iron（Fe） %≤ | 0.01 | |
| PH value（1% water solution） | 9.2-10.0 | 9.5-10.0 |
| Heavy metal (Pb) %≤ | 0.001 | |
| Arsenic (As) %≤ | 0.0003 | |
| Fluoride (F) %≤ | 0.003 | |
| Granularity 16mesh%≥ 35mesh%≥ 100mesh%≥ Powder 100mesh%≥ |
95 90 40 |
95.0 90.0 40.0 90.0 |
| White content %≥ | 90 | 90.0 |
