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           4,4’-Diaminostilbene-2,2’-disulf..
  
        
           p-nitrotoluene-o-sulfonic acid ..
  
        
           4,4-Dinitrostilbene-2,2-disulfon..
  
        
           Aniline-2,5-disulfonic acid mono..
  
        
           Para Amino Azo Benzene 4 Sulfoni..
  
        
           4-aminobenzene-1,3-disulphonic a..
  
        

        
  
        
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                   4,4’-Diaminostilbene-2,2’-disulfoni
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                   p-nitrotoluene-o-sulfonic acid 
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                   4,4-Dinitrostilbene-2,2-disulfonic 
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                   Aniline-2,5-disulfonic acid monosod
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                   Para Amino Azo Benzene 4 Sulfonic A
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                   4-aminobenzene-1,3-disulphonic acid
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