L-cysteine hcl monohydrate/cystine,China price supplier

Specific rotation[a] _D ^{20 °}           

+5.5°~+7.0°

+8.0 ~+10.1°

Calc.as.cysteine       

State of solution

Clear and colorless

Heavy metals(Pb)  

≤10PPm

Residue on ignition                           

≤0.1%  

Iron(Fe)

≤10PPm

Loss on drying                              

8.5~12.0%  

Other amino acids                          

Chromatographically not detectable  

Arsenic(As2O3) 

≤1PPm  

Chloride(CI) 

19.89~20.29%

Ammonium(NH4)

≤0.02%

Sulfate(SO4)    

≤0.02%

Assay                                  

99.0~100.5%             

PH

1.5~2.0