| Items | Standard | Results |
| Description | White crystalline powder | Complies |
| Identification | IR HPLC Reactive |
Conform with standard IR Conform with standard HPLC Conform |
| Solubility | Freely soluble in methanol,acetone,ethanol and tetrahydrofuran.And very soluble in acetonitrile | Complies |
| Total Impurity | max.0.5% | 0.18% |
| Total Unspecified Impurity | max. 0.2% | 0.08% |
| Individual unspecified impurlty | max. 0.1% | 0.05% |
| Related compound B | max. 0.2% | 0.07% |
| Related compound C | max. 0.2% | 0.04% |
| Related compound D | max. 0.1% | 0.05% |
| Related compound E | max. 0.1% | 0.06% |
| Limit of cyclohexane | max. 0.08% | ND |
| Limit of ethylacetate | max. 0.1% | 0.07% |
| Melting point | 81.0~84.0℃ | 82.5～83.2℃ |
| Water | max. 0.3% | 0.21% |
| Residue on ignition | max. 0.1% | 0.07% |
| Heavy Metals | max.0.001% | Complies |
| Assay(HPLC) | 98.0%～102.0% | 99.8% |
| Storage | Cool and dry | |
| Conclusion | It complies to USP32 . | |
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