White crystalline powder

                  
Assay ,%                

99.0 ~ 100.5

99.4

Identification

Infrared Absorption

Conforms

     
Sulfate(SO4),%(as SO4)  

≤0.020

<0.020

         
Loss on drying,%    

≤0.40

0.30

 
Residue on ignition  ,%  

≤0.10

0.07

           
Iron(as Fe),%            

≤0.001

<0.001

             
Heavy metals (as Pb),%          

≤0.001

<0.001

Chloride(as CI),%

19.12---19.51

19.25

Ammonium (NH4),%

≤0.02

<0.02

Arsenic , ppm

≤1

<1

PH Value

5.0~6.0

5.66

                                                                         
Specific optical rotation

+20.7°~ +21.5°

+21.1°(20ºC)

State of solution (transmittance)

Clear and colorless ;≥98.0%

               
 98.6

Other amino acids

Not detectable

Conforms

Conclusion: This product conforms to requirement of AJI92 standard.