Test Item | Specification |
Appearance | White crystalline powder |
Identification | Should conform |
Loss on Drying | ≤0.5% |
Other reducing material | ≤0.4ml |
Residue of ignition | ≤0.25% |
pH | 3.0~5.0 |
Melting point | 66~70℃ |
Figuration | Liquid is clear solution or limpid solution |
Arsenic content | ≤2ppm |
Heavy Metals | ≤10 ppm |
Iron | ≤1.0ppm |
Assay | Contains C2H7NS·HCl not less than 99.0% |