| Item | Standard | Results |
| Appearance | White to cream powder | White powder |
| PH | 2.3 〜2.4 | 2.3 |
| Melting Point | 158°C〜163°C | 158°C 〜160°C |
| Optical rotation | +186.0° 〜+188.0° | +187.7° |
| Loss on drying | <1.0% | 0.19% |
| Residue on ignition | <0.2% | 0.19% |
| Free ascorbic acid | <0.1% | Conform |
| Free glucose | <0.1% | Conform |
| Heavy metals (pb) | <10ppm | Conform |
| Arsenic(AS2O3) | <lppm | Conform |
| Assay | >98.0% | 99.0% |
| Purity | >99.5% | 99.8% |
| Conclusion | Complies with the standards. | |
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