Chemical Name

L-Tryptophan

Molecular Structure

Molecular Formula

C11H12N2O2

Molecular Weight

204.23

Characteristics

White to yellowish white crystalline powder

Packing

25㎏/drum，25㎏/carton

Quality  Standard

AJI92/USP28/EP5/FCCIV

Specification                                                                     

Specific rotation[a]_D^20°          

-30.5°~-32.5°          

State of solution

Clear

(Tranamittance)

≥95.0%

Chloride(Cl)

≤0.02%

Ammonium(NH4)                     

≤0.02%               

Sulfate(SO4)                            

≤0.020%       

Iron(Fe)                             

≤20PPm           

Heavy metals(Pb)                  

≤10PPm              

Arsenic(As₂O₃)                     

≤1PPm               

Other amio acids

conforms

Loss on drying                      

≤0.20%

Residue on ignition(Sulfated)                           

≤0.10%

Assay                                  

99.0～100.5%             

PH                                          

5.4～6.4