Items | Standard |
Appearance | White powder |
Assay, % | ≥98.0 |
Phosphorus pentoxide, % | 40.3-41.5 |
Potassium oxide (K2O), % | ≥52.0 |
PH value (10g/L solution) | 8.7-9.4 |
Heavy metal, as Pb, % | ≤0.001 |
Arsenic, as As, % | ≤0.0001 |
Fluoride as F, % | ≤0.001 |
Water insoluble, % | ≤0.2 |
Lead,% | ≤0.0001 |
Fe, % | ≤0.0004 |
Chlorine, % | ≤0.001 |
Ash, % | ≤0.2 |
Loss on drying, % | ≤2.0 |
Perchlorate, % | ≤0.00005 |
Cadmium, % | ≤0.0001 |
Mercury, % | ≤0.0001 |
Test for Potassium | Passes test |
Test for Phosphate | Passes test |