| ITEM | STANDARD | RESULTS |
| Appearance | White crystalline powder | Conforms |
| Assay, % | 98.0~101.0 | 99.9 |
| Loss on drying, % | ≤1.0 | 0.05 |
| PH | 7.0~9.8 | 7.7 |
| Heavy metals, ppm | ≤20 | 19 |
| Enantiomeric purity, % | ≤2.5 | 0.3 |
| Identification | ||
| Specific optical rotation, 째C | -14.7~-17.0 | -15.7 |
| Infrared absorption | Meet the requirements | Conform |
| Reaction of sodium | Meet the requirements | Conform |
| Related substances | ||
| Impurity L, % | ≤0.1 | <0.1 |
| Unspecified impurities, % | ≤0.1 | 0.03max |
| Total, % | ≤0.3 | 0.04 |
| Appearance of solution | Clear, not more intense than BY7 | Conform |
