Appearance White crystal or powder
Identification meets the requirements
Organic volatile impurities meets the requirements
Reducing substances meets the requirements
Assay(on dry basis) 97.0%-102.0%
PH 5.5-7.5
Water 11.6% max
Chloride 0.05% max
Sulfate 0.05% max
Lead 0.001% max
Arsenic 3ppm max
Cadmium 5ppm max