| ITEM | STANDARD | RESULTS |
| Appearance | Light yellow to yellow powder | Light yellow powder |
| Identification | Correspond to reference chromatograph | Conform |
| Purity(HPLC) | ≥99.0% | 99.8% |
| Max single impurity | ≤ 0.1% | 0.07% |
| Total impurities | ≤ 1.0% | 0.2% |
| Moisture content | ≤ 5.0% | 4.3% |
| Heavy metal | ≤ 20ppm | Conform |
| PH | 3.9~4.6 | 4.5 |
| Conclusion | Meets the Requirements | |
| Storage | Sealed,avoid light,below 5℃ | |
