L-Cystine

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L-Cystine

   CAS NO:56-89-3

             Chemical Name                        L-Cystine          
Molecular Structuref8fd0b2bab3390a68c5d452298d8f59f.jpg
Molecular FormulaC6H12N2O4S2
Molecular Weight240.29
CharacteristicsA colorless or white crystalline substance of hexagon,or crystalline powder,easily soluble in acid and alkali,insoluble in water and organic solvents such as alcohol, ethyl ether.
Packing25㎏/drum,25㎏/carton
Quality  StandardAJI92/USP28/EP5/FCCIV
Specification
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%
Assay98.0~101.0%
PH5~6.5


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