| TESTING ITEMS | SPECIFICATION | RESULTS |
| Appearance | White crystalline powder | Conforms |
| Identification | Meet the requirement | Conforms |
| Melting point | 96℃~99℃ | 98℃ |
| PH | 1.5~3.0 | 2.4 |
| Loss on drying | ≤0.5% | 0.09% |
| Residue on ignition | ≤0.1% | 0.05% |
| Related substances | Any single impurity ≤0.5% | 0.10% |
| Total impurities ≤1.0% | 0.26% | |
| Heavy metals | ≤10ppm | <10ppm |
| Assay | 98.5%~ 101.0% | 99.45% |
| Conclusion: The Product Conforms to CP/USP. |
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