89923-60-4 Benzenesulfonic acid, 3,3'-((2,2'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(4-chloro-, disodium salt Disodium 3,3'-((2,2'-dimethyl(1,1'-biphenyl)-4,4'-diyl)bis(azo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)))bis(4-chlorobenzenesulphonate) EINECS 289-549-7