Molecular Formula: C4H8N2O3•H2O
Molecular Weight: 150.13
CAS No： 5794-13-8
| L- Asparagine | CP2020 | EP11 | USP2022 |
| Assay | ≥98.0% | 99.0-101.0% | 98.0-101.5% |
| PH | / | 4.0-6.0 | / |
| Specific rotation[a]D20 | +31.0°-+35.0° | +33.7-+36.0 | +33.0°-+36.5° |
| Specific rotation[a]D25 | / | / | / |
| Appearance of solution | / | clear & colorless | / |
| Transmittance(T430) | ≥98.0% | / | / |
| Lead | / | / | ≤5PPM |
| Chloride(Cl) | ≤0.005% | ≤0.02% | / |
| Ammonium(NH4) | ≤0.1% | ≤0.1% | / |
| Sulfate(SO4) | ≤0.005% | ≤0.02% | / |
| Iron(Fe) | ≤10PPM | ≤10PPM | / |
| Heavy metals(Pb) | ≤10PPM | / | / |
| Arsenic | ≤1PPM | / | / |
| Other amino acids | ≤0.5% | Impurity A ≤ 0.5% Impurity C ≤ 0.1% each impurity ≤ 0.05% total impurity≤ 0.8% | total impurities≤ 1.0% |
| Ninhydrin-positive substances | / | / | / |
| Loss on drying | 11.5%～12.5% | 10.5-12.5% | 11.5-12.5% |
| Residue on ignition | ≤0.10% | ≤0.10% | ≤0.10% |
| Endotoxin | ＜ 25 EU/g | ＜ 25 EU/g | ＜ 25 EU/g |
| Total plate count | ≤ 500 CFU/g | ≤ 500 CFU/g | ≤ 500 CFU/g |
| Moulds & Yeasts | ≤ 50 CFU/g | ≤ 50 CFU/g | ≤ 50 CFU/g |
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