| Item | Standard | Analysis data |
| Appearance | Off-White crystals or crystalline powder | Conforms |
| Specific rotation(a)D20 | -74.0º to –77.0º | -74.19 |
| Transmittance | Not less than 95.0% | 96.4% |
| Chloride(C1) | Not more than 0.02% | <0.02% |
| Ammonium(NH4) | Not more than 0.02% | <0.02% |
| Sulfate (SO4) | Not more than 0.02% | <0.02% |
| Heavy metals(Pb) | Not more than 10ppm | <10ppm |
| Iron(Fe) | Not more than 10ppm | <10ppm |
| Arsenic(As2O3) | Not more than 1 PPM | <1ppm |
| Other Amino Acids | Conforms | Conforms |
| Loss on drying | Not more than 0.20% | 0.15% |
| Residue on ignition | Not more than 0.1% | 0.09% |
| Assay | 98.5-101.0% | 99.1% |
| PH | 5.0～6.5 | 5.4 |
