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You are here:   Home > EZSourcing > Sourcing Request > L-Cysteine Base 52-90-4

L-Cysteine Base 52-90-4
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-Cysteine BaseCAS NO：52-90-4Chemical NameL-Cysteine BaseMolecular Structure
Molecular FormulaC3H7NO2SMolecular Weight121.15CharacteristicsWhite crystalline powder,tasteless,easily soluble in water but insoluble in alcohol and etherPacking25㎏/drum，25㎏/cartonQuality  StandardAJI92/USP28/EP5/FCCIV

Specification

 

Specific rotation[a]D20°          

+8.3°～+9.5°         

State of solution

≥95.0%

Heavy metals(Pb)  

≤10PPm

Residue on ignition                           

≤0.1%  

Iron(Fe)

≤10PPm

Loss on drying                              

≤0.5%  

Other amino acids                          

Conforms  

Arsenic(As2O3) 

≤1PPm 

Chloride(CI) 

≤0.04%

Ammonium(NH4)

≤0.02%

Sulfate(SO4)    

≤0.03%

Assay                                  

98.0～101.0%             

PH

4.5～5.5

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