Appearance | White crystalline powder |
---|---|
Assay (T) | 99.0-102.0%w/w |
pH (5% in water) | 4.2-4.5 |
Reducing substances | Passes test |
Water insolubles | max. 0.2% |
Loss on drying (130°C) | 21.5-24.0% |
Arsenic (As) | max. 0.0002% |
Chloride (Cl) | max. 0.005% |
Heavy metals (as Pb) | max. 0.001% |
Iron (Fe) | max. 0.0005% |
Sulfate (SO4) | max. 0.02% |