Complaint
| Test Items | Specification |
| Assay | ≥98.5% |
| Characteristic | White sheet or crystalline powder |
| Specific rotation[a]D | +21.0°~ +25.0° |
| Identification | The infrared absorption spectrum of the product is consistent with the control map (spectral set 444) |
| PH | 5.6~6.1 |
| Transmittance | ≥98.0% |
| Chloride | ≤0.02% |
| Sulfate | ≤0.02% |
| Ammonium | ≤0.02% |
| Other amino acids | ≤0.5% |
| Loss on drying | ≤0.2% |
| Residue on ignition | ≤0.1% |
| Iron | ≤0.0015% |
| Heavy metals(as Pb) | ≤10ppm |
| Arsenic | ≤0.0001% |
