ITEMS | STANDARDS | RESULTS | METHODS |
Appearance | White crystals or crystalline powder | Complies | Organoleptic |
Identification | IR spectrum conforms to the reference IR spectrum | Positive | USP |
Specific rotation(°) | -29°~-32° | -30.92° | USP |
pH | 5.5-9.5 | 7.09 | USP |
Water content (%) | ≤0.5 | 0.24 | USP |
Residue on ignition | ≤0.1% | 0.04% | USP |
Heavy metals(ppm) | ≤10 | <10 | USP |
Arsenic(ppm) | ≤1 | <1 | USP |
Assay (%) | 97.0~103.0 | 99.65 | USP |