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You are here:   Home > EZSourcing > Sourcing Request > L-Cystine 56-89-3

L-Cystine 56-89-3
Categories: Active Pharmaceutical Ingredients>Biochemical Ingredients>Amino Acids and Derivatives
Expected Quantity: 1000
Valid To: 2018-07-11
Delivery To: China Mainland
Date Posted: 2018-04-09
The sourcing request is closed now.
Request Details

L-CystineCAS NO：56-89-3Chemical NameL-CystineMolecular Structure
Molecular FormulaC6H12N2O4S2Molecular Weight240.29CharacteristicsA 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㎏/cartonQuality  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%

Assay                                  

98.0～101.0%             

PH

5～6.5

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