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Name:D-Cysteine hydrochloride

Molecular Structure :

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) 19.89～20.29%
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  8.5～12.0%
Residue on ignition ≤0.10%  
(Sulfated)  
Assay  99.0～100.5%
PH   1.5～2.0