| Items | Specifications |
| Appearance | White or almost white crystalline powder |
| Melting point | 162.0-171.0°C |
| Rotation | +6.0°- +10.0° |
| Loss on drying | ≤0.5% |
| Residue on ignition | ≤0.1% |
| Heavy metals | ≤10ppm |
| Assay(UV) | 98.0-102.0% |
| Purity(HPLC) | ≥99.0% |
| Storage | Keep dry, stable at room temperature |
