94021-36-0

5-[[4-[[8-[[2,4-dihydroxy-3-[(2-methoxy-5-sulphophenyl)azo]phenyl]azo]-1-hydroxy-3,6-disulpho-2-naphthyl]azo]-3,3-dimethoxy[1,1-biphenyl]-4-yl]azo]salicylic acid, sodium salt