STPP 96%Min | Industry Grade | Food Grade |
Purity (Na5P3O10)% ≥ | 96 | 96 |
P2O5 %≥ | 57.00 | 57 |
Iron (Fe) %≤ | 0.01 | ----- |
PH of 1% water solution | 9.2-10.0 | 9.5-10 |
Water insoluble Matter %≤ | 0.15 | 0.05 |
Whiteness | 90 | 85 |
Sulfate% | 0.4% MAX | |
Type I % | 5-40 | 10-60 |
Density(g/cm3 ) | 0.62-0.9 | 0.65-0.85 |