| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | White or slightly yellowish crystalline powder | Conforms |
| Loss on drying | ≤1.00% | 0.73% |
| Residue on ignition | ≤0.10% | 0.04% |
| Related substance | Single impurity ≤1.0% | 0.7% |
| Total impurities ≤3.0% | 1.5% | |
| Heavy metals | ≤0.002% | 0.0001% |
| PH | 4.5~5.8 | 5.6 |
| Assay | ≥97.0% | 98.40% |
| Conclusion: The Product Conforms to CP/JP. |
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