Assay | ≥98% |
PH-value,5% water solution | 7-9 |
Arsenic(As2O3) | ≤2PPM |
Heavy metal (Pb) | ≤10PPM |
Sulphate (SO2-4) | ≤0.019% |
Potassium permanganate reducing substances | Qualified |
Drying loss (120°C, 3h) | ≤2% |
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