N-Acetyl-L-Cysteine CAS NO.616-91-1

Items

     Limits                   

Results 

Appearance

White crystalline powder or

colorless crystals

Conforms

Specific rotation

+21.3~+27.0°

+22.8°

State of solution

(Transmittance)                      

≥95.0%        

99.2%

Chloride (CL)

≤0.040%       

＜0.020%       

Ammonium (NH4)

≤0.020%               

＜0.020%               

Sulfate (SO4)

≤0.030%       

＜0.020%       

Iron (Fe)

≤20ppm           

＜5ppm           

Heavy metals (Pb)

≤10ppm              

＜5ppm              

Arsenic (As2O3)

≤1ppm               

＜1ppm               

Other Amino Acids

Chromatographically not

detectable

Conforms

Loss on drying

≤0.50%           

0.1%

Residue on ignition

(Sulfated)                           

≤0.20%  

0.05%

Assay                                  

98.5~101.0%

99.8%

PH                                         

2.0~2.8

2.4

Melting point

106~110℃

106~108℃

Conclusion:        

The Product Conforms to AJI92