Molecular Formula: C9H11NO3
Molecular Weight: 181.19
CAS No： 60-18-4
| L-Tyrosine | CP2020 | EP11 | USP2023 |
| Assay | ≥99.0% | 99.0-101.0% | 98.5-101.5% |
| PH | 5.0-6.5 | / | / |
| Specific rotation[a]D20 | -11.3°--12.1° | -11.0°--12.3° | / |
| Specific rotation[a]D25 | / | / | -9.8°--11.2° |
| Transmittance(T430) | ≥95.0% | / | / |
| Appearance of solution | / | clear & colorless≤Y7 | / |
| Chloride(Cl) | ≤0.02% | ≤0.02% | ≤0.04% |
| Ammonium(NH4) | ≤0.02% | ≤0.02% | / |
| Sulfate(SO4) | ≤0.02% | ≤0.03% | ≤0.04% |
| Iron(Fe) | ≤10PPM | ≤10PPM | ≤30PPM |
| Heavy metals(Pb) | ≤10PPM | / | / |
| Arsenic | ≤1PPM | / | / |
| Other amino acids | ≤0.40% | / | individual impurities≤0.5% total impurities≤2.0% |
| Ninhydrin-positive substances | / | Impurity A≤0.5% Each impurity≤0.2% Sum of impurities≤0.6% | / |
| Loss on drying | ≤0.20% | ≤0.50% | ≤0.30% |
| Residue on ignition | ≤0.10% | ≤0.10% | ≤0.40% |
| Endotoxin | <0.25EU/ml | <0.25EU/ml | <0.25EU/ml |
| 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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