Item
Standard
Analysis data
Appearance
White powder
conforms
State of Solution (Transmittance)
Not less than 95.0%
96.2%
Chloride (Cl)
Not more than 0.02%
0.018%
Heavy metal(Pb)
Not more than 15ppm
<15ppm
Arsenic(As2O3)
Not more than 2ppm
<2ppm
Loss on drying
Not more than 0.20%
0.19%
Residue on ignition(sulfated)
Not more than 0.20%
0.1%
Assay
98.0 to101.0%
99.0%