Molecular Formula: C6H9N3O2•Hcl•H2O
Molecular Weight: 209.63
CAS No： 645-35-2
| L-Histidine Hcl | CP2020 | EP11 | AJI92 |
| Assay | ≥ 99.0% | 98.5-101.0% | 99.0-101.0 |
| PH | 3.5-4.5 | 3.0-5.0 | 3.5-4.5 |
| Specific rotation[a]D20 | +8.5°-+10.5° | +9.2°-+10.6° | +8.9°-+9.5° |
| Specific rotation[a]D25 | / | / | / |
| Transmittance(T430) | ≥ 98.0% | / | ≥98.0% |
| Appearance of solution | / | clear & colorless ≤BY6 | / |
| Chloride(Cl) | 16.7%-17.1% | / | 16.66-17.08% |
| Ammonium(NH4) | ≤0.02% | ≤0.02% | ≤0.02% |
| Sulfate(SO4) | ≤0.02% | ≤0.03% | ≤0.02% |
| Iron(Fe) | ≤10PPM | ≤10PPM | ≤10PPM |
| Heavy metals(Pb) | ≤10PPM | / | ≤10PPM |
| Arsenic | ≤1PPM | / | ≤1PPM |
| Other amino acids | ≤0.02% | / | conform |
| Ninhydrin-positive substances | / | Each impurities≤ 0.2% Total impurities≤ 0.5% | / |
| Loss on drying | ≤0.02% | 7.0-10.0% | ≤0.20% |
| Residue on ignition | ≤0.10% | ≤0.10% | ≤0.10% |
| Total plate count | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
| Moulds & Yeasts | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |
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