Molecular Formula: C5H9NO2
Molecular Weight: 115.13
CAS No: 147-85-3
L-Proline | CP2020 | EP11 | USP2023 | AJI92 |
Assay | ≥99.0% | 98.5-101.0% | 98.5-101.5% | 99.0-101.0% |
PH | 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° | / |
Transmittance(T430) | ≥98.0% | / | / | ≥98.0% |
Appearance of solution | / | clear & colorless | / | / |
Chloride(Cl) | ≤0.02% | ≤0.02% | ≤0.05% | ≤0.02% |
Ammonium(NH4) | ≤0.02% | ≤0.02% | / | ≤0.02% |
Sulfate(SO4) | ≤0.02% | ≤0.03% | ≤0.03% | ≤0.02% |
Iron(Fe) | ≤10PPM | ≤10PPM | ≤30PPM | ≤10PPM |
Heavy metals(Pb) | ≤10PPM | / | / | ≤10PPM |
Arsenic | ≤1PPM | / | / | ≤1PPM |
Other amino acids | ≤0.5% | / | Individual impurities≤0.5% Total impurities≤2.0% | Individual impurities≤0.5% Total impurities≤2.0% |
Ninhydrin-positive substances | / | Each impurity≤0.2% Total impurities≤0.5% | / | / |
Loss on drying | ≤0.30% | ≤0.50% | ≤0.4% | ≤0.30% |
Residue on ignition | ≤0.10% | ≤0.10% | ≤0.4% | ≤0.10% |
Total plate count | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
Moulds & Yeasts | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |