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Specific rotation[a]D20° | -215°~-225° |
State of solution | ≥98.0% |
Heavy metals(Pb) | ≤10PPm |
Residue on ignition | ≤0.1% |
Iron(Fe) | ≤20PPm |
Loss on drying | ≤0.02% |
Other amino acids | Conforms |
Arsenic(As2O3) | ≤1PPm |
Chloride(CI) | ≤0.02% |
Ammonium(NH4) | ≤0.02% |
Sulfate(SO4) | ≤0.02% |
Assay | 98.0~101.0% |
PH | 5~6.5 |
L-Cystine