China Pharmaceutical Raw Material L-Histidine 99%, Find details about China Amino Acid, Pharmaceutical Intermediate from Pharmaceutical Raw Material L-Histidine 99%
| Analytical Items | Standard |
| Appearance | White crystals or crystalline powder |
| Assay | 98.5%~101.5% |
| pH | 7.0 - 8.5 |
| Specific Rotation | +12.6o to +14.0o |
| Loss on drying | ≤0.2% |
| Residue on ignition | ≤0.4% |
| Chloride | ≤0.05% |
| Sulphate | ≤0.03% |
| Iron | ≤0.003% |
| Heavy Metals (Pb) | ≤0.0015% |
| Chromatographic purity | Individual impurities ≤0.5% |
| Total impurities ≤2.0% |