CAS No.:147-85-3
L-Proline
Molecular Formula: C5H9NO2
Molecular Weight: 115.13
CAS Number: 147-85-3
Specifications
| L-Proline | CP2020 | EP11 | USP2023 | AJI92 |
| content | ≥99.0% | 98.5-101.0% | 98.5-101.5% | 99.0-101.0% |
| acidity | 5.9-6.9 | / | / | 5.9-6.9 |
| Specific rotation [a]D20 | -84.5°–86.0° | -84.0°–86.0° | / | -84.5°–86.0° |
| Specific rotation [a]D25 | / | / | -84.3°–86.3° | / |
| Light | ≥98.0% | / | / | ≥98.0% |
| Solution appearance | / | clear & colorless | / | / |
| chloride | ≤0.02% | ≤0.02% | ≤0.05% | ≤0.02% |
| Ammonium salt | ≤0.02% | ≤0.02% | / | ≤0.02% |
| sulfate | ≤0.02% | ≤0.03% | ≤0.03% | ≤0.02% |
| Iron salts | ≤10PPM | ≤10PPM | ≤30PPM | ≤10PPM |
| heavy metal | ≤10PPM | / | / | ≤10PPM |
| Arsenic salts | ≤1PPM | / | / | ≤1PPM |
| Other amino acids | ≤0.5% | / | Individual impurities≤0.5% Total impurities≤2.0% | Individual impurities≤0.5% Total impurities≤2.0% |
| Ninhydrin active substance | / | Each impurity≤0.2% Total impurities≤0.5% | / | / |
| Loss on drying | ≤0.30% | ≤0.50% | ≤0.4% | ≤0.30% |
| Residue of ignition | ≤0.10% | ≤0.10% | ≤0.4% | ≤0.10% |
| Total bacteria | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
| Mold & yeast | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |