
| Items | Limits |
| Appearance | White crystals or crystalline powder |
| Identification(IR) | Conordant with the referennce spectrum |
| Assay % | 98.5~101.5 |
| Specific rotation [a]D20 | -33.2°~-35.2° |
| Transmittance,% | ≥95 |
| Loss on drying % | <0.30 |
| pH | 5.4~6.0 |
| Residue on ignition % | <0.1 |
| Chloride (Cl) % | <0.03 |
| Sulfate (SO4) % | <0.03 |
| Iron (Fe) mg/kg | <30 |
| Other Amino acide % | <0.5 |
| Heavy metals mg/kg | <15 |
| Arsenic(As) mg/kg | <1.5 |
| Total plate count(cfu/g) | <3000 |
| coliform (cfu/g) | <10 |
| Pathogenic bacteria | Negative |