Specifications:
Item Standard Analysis data
Appearance White crystals or crystalline powder conforms
State of solution
(Transmittance) Not less than 95.0% 98.0%
Chloride (Cl) Not more than0.1% ＜0.1%
Heavy metal(Pb) Not more than 10ppm ＜10ppm
Arsenic(As2O3) Not more than 2ppm ＜2ppm
Loss on drying Not more than 0.50% 0.095%
Residue on ignition(sulfated) Not more than 0.20% 0.12%
Assay 98.0 to101.0% 99.0%
含量>98.5%