| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | White crystalline powder | Conforms |
| Identification | Meet the requirement | Conforms |
| Melting point | 171℃~174℃ | 173℃ |
| Loss on drying | ≤0.50% | 0.11% |
| Sulphated ash | ≤0.10% | 0.04% |
| Heavy metals | ≤0.002% | 0.001% |
| Residue on ignition | ≤1.0% | 0.08% |
| Assay | ≥99.0% | 99.31% |
| Conclusion: The Product Conforms to USP. |
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