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L-cystine HCL has good stability

L-cystine hydrochloride is an organic compound with the chemical formula C3H7NO2S·HCl, among which L-cystine is a natural amino acid widely existing in the biological world of the earth, with biological activity and antioxidant properties. The hydrochloride form means that the amino acid in the cystine molecule is combined with hydrochloric acid to form a hydrochloride.


    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.



    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%


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