disodium 4,4-bis[(2-hydroxy-1-naphthyl)azo]-5,5-dimethoxy[1,1-biphenyl]-2,2-disulphonate

disodium 4,4-bis[(2-hydroxy-1-naphthyl)azo]-5,5-dimethoxy[1,1-biphenyl]-2,2-disulphonate · CAS 6428-81-5