| Testing Items | Specifications | Results |
| Appearance | White crystalline powder | Conforms |
| Identification | IR & NMR spectrum | Conforms |
| Metal point | 194℃~198℃ | 197℃ |
| PH | 2.0~2.5 | 2.3 |
| Loss on drying | ≤0.50% | 0.17% |
| Residue on ignition | ≤0.20% | 0.10% |
| Ammonium Ion | ≤0.01% | <0.01% |
| Arsenic | ≤1ppm | <1ppm |
| Heavy metals | ≤20ppm | <20ppm |
| Assay | 98.5~101.5% | 99.80% |
| Conclusion: The Product Conforms to JPC. |
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