| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Characteristics | Almost white or slight yellow crystalline powder | Conforms |
| Identification | Meet the requirements | Conforms |
| Related substance | Any other single impurity ≤0.5% | 0.05% |
| Total impurities ≤1.0% | 0.16% | |
| Loss on drying | ≤6.5% | 3.2% |
| Residue on ignition | ≤0.1% | 0.03% |
| Chloride | ≤0.02% | <0.02% |
| Sulfate | ≤0.04% | <0.04% |
| Heavy metals | ≤20ppm | <20ppm |
| PH | 4.5~5.5 | 5.1 |
| Assay | 98.0%~102.0% | 99.80% |
| Conclusion: The Product Conforms to CP/USP. |
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