Name                             Olsalazine  

Molecular Formula      C*4H*0N2O6  

Molecular Weight         **2.*4  

CAS Registry Number      *********2  

Yellow crystalline powder  

Absorption maxima at **5nm and **2nm  **5nm and **2nm wavelengths of the absorption ratio was 0.*3 to 0.*6   

Acetate  ≤1.0%   

Mesylate  ≤0.3%  

Single impurity≤1.0%  

Total impurity≤2.0%   

Loss on drying ≤2.0%  

Heavy Metal ≤*0ppm  

Assay *8.0%～**2.0%  

For the treatment ofacute and chroniculcerativecolitis.