SPECIFICATION
| Appearance | White or almost white crystalline powder or colorless crystals |
| Appearance of solution | Clear and not more intensely colored than reference solution BY6 |
| Assay | 98.5-101.0% |
| Specific optical rotation | +26.5°- +29.0° |
| Ninhydrin-positive substances | Any impurity ≤ 0.5% |
| Chloride | ≤0.02% |
| Sulfate | ≤0.03% |
| Ammonium | ≤0.02% |
| Iron | ≤ 10ppm |
| Heavy metals | ≤ 10ppm |
| Lead | ≤ 5ppm |
| Loss on drying | ≤0.5% |
| Residue on ignition | ≤0.1% |
MOLECULAR STRUCTURE：
Molecular Formula:C5H11NO2
