| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Characteristics | White crystalline powder | Conforms |
| Identification | Meet the requirements | Conforms |
| Melting point | 337℃~339℃ | 338℃ |
| Related substances | Any other single impurity ≤0.2% | 0.12% |
| Total impurities ≤0.5% | 0.18% | |
| Loss on drying | ≤0.5% | 0.21% |
| Residue on ignition | ≤0.1% | 0.03% |
| Sulphated ash | ≤0.1% | 0.06% |
| Heavy metals | ≤20ppm | <20ppm |
| Assay | 99.0%~101.0% | 99.58% |
| Conclusion: The Product Conforms to USP/EP. |
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