SPECIFICATION
| Appearance | A white or almost white, crystalline powder or colorless crystals |
| Appearance of solution | Clear and not more intensely colored than reference solution Y7 |
| Specific rotation | -11.0°~ -12.3° |
| Ninhydrin-positive substances | ≤ 0.5% |
| Chloride | ≤ 0.02% |
| Sulfates | ≤ 0.03% |
| Ammonium | ≤ 0.02% |
| Iron | ≤10ppm |
| Heavy metals | ≤10ppm |
| Lead | ≤5ppm |
| Loss on drying | ≤ 0.5% |
| Residue on ignition | ≤ 0.1% |
| Assay | 99.0-101.0% |
MOLECULAR STRUCTURE：
Molecular Formula:C9H11NO3
