0102030405
L-cystine HCL has good stability
Introduction
L-cystine hydrochloride is generally a white crystalline powder, soluble in water and alcohol solvents. Its melting point is about 213-216 degrees Celsius. L-cystine hydrochloride has good stability and is not easy to decompose. It is more stable under neutral or slightly acidic conditions, and will decompose under alkaline conditions. In addition, the compound is sensitive to light and heat and needs to be stored in a cool, dry place.
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Specification
| L-Cystine | USA Index | AJI92 | FCCV |
| Assay | 98.5-101.5% | 98.5-101.0% | 98.5-101.5% |
| PH | / | 5.0-6.5 | / |
| Specific rotation[a]D20 | -215°--225° | -215°--225° | -215°--225° |
| Specific rotation[a]D25 | / | / | / |
| Transmittance(T430) | / | ≥98.0% | / |
| Chloride(Cl) | ≤0.02% | ≤0.02% | / |
| Ammonium(NH4) | / | ≤0.02% | / |
| Sulfate(SO4) | ≤0.02% | ≤0.02% | / |
| Iron(Fe) | ≤10PPM | ≤20PPM | / |
| Heavy metals(Pb) | ≤10PPM | ≤10PPM | ≤5PPM |
| Arseni | / | ≤1PPm | / |
| Other amino acids | individual impurities≤0.2% total impurities≤2.0% | conform | / |
| Ninhydrin-positive substances | / | / | / |
| Loss on drying | ≤0.20% | ≤0.20% | ≤0.20% |
| Residue on ignition | ≤0.10% | ≤0.10% | ≤0.10% |
