D-Cysteine hydrochloride

Product Description

 Name:D-Cysteine hydrochloride  
Molecular Formula:C3H7NO2S.HCl;C3H8ClNO2S
Molecular Weight:157.62
CAS Registry Number:32443-99-5
EINECS:251-043-9

Specification:
Product name
 D-Cysteine hydrochloride
 
      Item                                
      Limit                   
 
Specific rotation[a]D20          
 +5.5°+7.0°         
 
State of solution                       
 98.0%        
 
(Transmittance)
 
 
Chloride(Cl)                          
 19.8920.29%
 
Ammonium(NH4)                    
 0.02%               
 
Sulfate(SO4)                            
 0.020%       
 
Iron(Fe)                             
 10PPm           
 
Heavy metals(Pb)                  
 10PPm              
 
Arsenic(As2O3)                     
 1PPm               
 
Other amino acids                  
 Chromatographically 
 
                                         
 not detectable 
 
Loss on drying                      
 8.512.0%
 
Residue on ignition                           
 0.10%  
 
(Sulfated)
 
 
Assay                                  
 99.0100.5%             
 
PH                                         
 1.52.0