| ≥1 piece | 55 |
| Items | Standards | Results |
| Appearance | Crystalline powder | Crystalline powder |
| Taste | A bit sweet taste | Complies |
| Assay | 98.5%~101.5% | 99.6% |
| Melting Point | 185~186 Degree | 185 Degree |
| Solubleness | Soluble in water | Complies |
| Specitic rotation[α ]D20 | +6.3 o -+7.3 o | +6.74 o |
| Heavy metals | ≤ 5ppm | < 5ppm |
| Loss on drying | ≤ 0.30% | 0.04% |
| Residue on ignition | ≤ 0.10% | 0.08% |
| Conclusion | Conform with USP34 | |