1H-Naphth(1,2-d)imidazole-7-sulfonic acid, 8-((5-((2-bromo-1-oxo-2-propenyl)amino)-2-sulfophenyl)azo)-1-((2-chlorophenyl)amino)-9-hydroxy-2-methyl-, disodium salt 72496-91-4 Disodium 8-((5-((2-bromo-1-oxoallyl)amino)-2-sulphonatophenyl)azo)-1-((2-chlorophenyl)amino)-9-hydroxy-2-methyl-1H-naphth(1,2-d)imidazole-7-sulphonate EINECS 276-703-3