| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | White crystalline powder | Conforms |
| Identification | IR Absorption; Tests of chloride | Conforms |
| Absorbance of solution | ≤0.025% | 0.015% |
| PH | 2.7~3.4 | 3.2 |
| Limit of nitrate | No brown ring produced at the junction of the two layers | Conforms |
| Loss on drying | ≤5.0% | 3.39% |
| Residue on ignition | ≤0.2% | 0.04% |
| Related compounds | ≤1.0% | 0.03% |
| Residual solvent | Methanol ≤0.3% | 0.0073% |
| Turbidity | Ethanol ≤0.5% | Not detected |
| Assay(in dry basis) | 98.0%~102.0% | 99.1% |
| Conclusion: The Product Conforms to USP. |
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