CAS No.:72-18-4
L-Valine
Molecular Formula： C5H11NO2
Molecular Weight: 117.15
CAS Number: 72-18-4
Specifications
| L-valine | CP2020 | EP11 | USP2023 |
| content | ≥98.5% | 98.5-101.0% | 98.5-101.5% |
| acidity | 5.5-6.5 | / | 5.5-7.0 |
| Specific rotation [a]D20 | +26.6°-+28.8° | +26.5°-+29.0° | / |
| Specific rotation [a]D25 | / | / | +26.6°-+28.8° |
| Light | ≥98.0% | / | / |
| Solution appearance | / | clear & colorless ≤BY6 | / |
| chloride | ≤0.02% | ≤0.02% | ≤0.05% |
| Ammonium salt | ≤0.02% | ≤0.02% | / |
| sulfate | ≤0.03% | ≤0.03% | ≤0.03% |
| Iron salts | ≤10PPM | ≤10PPM | ≤30PPM |
| heavy metal | ≤10PPM | / | / |
| Arsenic salts | ≤1PPM | / | / |
| Other amino acids | ≤0.5% | / | individual impurities≤0.5%total impurities≤2.0% |
| Ninhydrin active substance | / | Impurity B at 570 nm≤0.4% each impurity ≤0.2%total ≤1.0% | / |
| Loss on drying | ≤0.20% | ≤0.50% | ≤0.30% |
| Residue of ignition | ≤0.10% | ≤0.10% | ≤0.10% |
| endotoxin | <20EU/g | <20EU/g | <20EU/g |
| Total bacteria | ≤ 500 CFU/g | ≤ 500 CFU/g | ≤ 500 CFU/g |
| Mold & yeast | ≤ 50 CFU/g | ≤ 50 CFU/g | ≤ 50 CFU/g |