| Testing items | Specifications | Results |
| Description | White or off-white crystalline powder | Conforms |
| Identification | IR and UV absorption | Conforms |
| Melting point | 139℃~144℃ | 140.5℃ |
| Loss on drying | ≤1.0% | 0.15% |
| Residue on ignition | ≤0.20% | 0.07% |
| Heavy metals | ≤20ppm | Conforms |
| Related substances | Single impurity ≤0.2% | 0.09% |
| Sum impurity ≤1.0% | 0.22% | |
| Assay | 98.0%~102.0% | 100.10% |
| Conclusion: The Product Conforms to CP/USP. | ||
