Item | Specification |
Appearance | White or off-white powder |
Appearance of solution | Clear and colorless |
Identification IR | Conforms to the reference spectrum |
Assay | ≥98.0% |
Optical rotation | -15.5°- 17.5° |
Residue on ignition | ≤0.1% |
Loss on drying | ≤0.5% |
Related substances | Total impurities≤2.0% |
GSSG≤1.5% | |
Heavy metals | ≤10ppm |
Chlorides | ≤200ppm |
As | ≤1ppm |
Iron | ≤10ppm |
Sulfate | ≤ 300ppm |
Ammonium | ≤200ppm |