Item | Specification |
Appearance | White or almost white crystalline powder |
Identification | Infrared absorption |
Optical rotation: -15.5°~-17.5° | |
Ammonium | ≤200ppm |
Arsenic | ≤2ppm |
Chloride | ≤200ppm |
Sulfate | ≤300ppm |
Iron | ≤10ppm |
Residue on ignition | ≤0.1% |
Related compounds | Individual impurity ≤1.5% |
Total impurities ≤2.0% | |
Clarity and color of solution | The solution is clear and colorless |
Loss on drying | ≤0.5% |
Assay | 98.0%~101.0%, calculated on the dried basis |