| Item | Standard | Results | |
| Appearance | White crystalline powder or colorless crystals | Conform | |
| Assay(dry content %) | 98.5 to 101.5 | 99.6 | |
| Identification | as per USP33 | Conform | |
| Specific rotation[ɑ]D20 | -9.8° to -11.2° | -10.8° | |
| Loss on drying | ≤0.3% | 0.17% | |
| Residue on ignition | ≤0.4% | 0.04% | |
| Chloride | ≤0.04% | ＜0.04% | |
| Sulfate | ≤0.04% | ＜0.04% | |
| Iron | ≤0.003% | ＜0.003% | |
| Heavy metals | ≤0.0015% | ＜0.0015% | |