| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Characteristics | Faintly yellowish to light yellow powder | Conforms |
| Identification | Meet the requirements | Conforms |
| Related substances | Organic impurities ≤0.2% | 0.13% |
| Total impurities ≤0.5% | 0.17% | |
| Loss on drying | ≤6.5% | 4.5% |
| Residue on ignition | ≤0.1% | 0.03% |
| Heavy metals | ≤10ppm | 2ppm |
| PH | 3.0~4.5 | 3.8 |
| Assay | 98.0%~102.0% | 99.33% |
| Conclusion: The Product Conforms to USP/EP. |
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