| Item | Specifications (USP) | Specifications (AJI) |
| Description | White crystals or crystalline powder | White crystals or crystalline powder |
| Identification | Infrared absorption spectrum | Infrared absorption spectrum |
| Specific rotation[a]D20° | +26.3 °- +27.7° | +26.9 °- +27.9° |
| State of solution/Transmittance | --- | >= 98.0% |
| Chloride (Cl) | =< 0.05% | =< 0.020% |
| Ammonium (NH4) | --- | =< 0.02% |
| Sulfate (SO4) | =< 0.03% | =< 0.020% |
| Iron (Fe) | =< 0.003% | =< 10PPm |
| Heavy metals (Pb) | =< 0.0015% | =< 10PPm |
| Arsenic (As2O3) | --- | =< 1PPm |
| Other amino acids | --- | Chromatographically not detectable |
| Loss on drying | =< 0.5% | =< 0.5% |
| Residue on ignition(sulfated) | =< 0.3% | =< 0.10% |
| Assay | 98.5-101.5% | 99.0-101.0% |
| PH | --- | 10.5-12.0 |
| Organic volatile impurities | Meets the requirements | ? --- |