Items | Standard |
Appearance | White crystal |
Content(KH2PO4) | ≥99.0% |
Phosphorus pentoxide(P2O5) | ≥52.0% |
Potassium oxide(K2O) | ≥34.0% |
PH value (3% water solution) | 4.3-4.7 |
Moisture | ≤0.2% |
Water-insoluble | ≤0.01% |
Chloride (Cl-) | ≤0.05% |
As | ≤50mg/kg |
Pb | ≤20mg/kg |
Cd | ≤2mg/kg |
Cr | ≤2mg/kg |
Hg | ≤1mg/kg |