|
Item |
Standard |
Analysis data |
|
Appearance |
White crystals or crystalline powder |
conforms |
|
State of solution (Transmittance) |
Not less than 95.0% |
98.3% |
|
Chloride (Cl) |
Not more than0.1% |
0.008% |
|
Heavy metal(Pb) |
Not more than 10ppm |
＜10ppm |
|
Arsenic(As2O3) |
Not more than 2ppm |
＜2ppm |
|
Loss on drying |
Not more than 0.50% |
0.20% |
|
Residue on ignition(sulfated) |
Not more than 0.20% |
0.12% |
|
Assay |
98.0 to101.0% |
99.4% |
