12226-33-4 2-Naphthalenesulfonic acid, 5-((4-((2-bromo-1-oxo-2-propenyl)amino)-2-sulfophenyl)azo)-4-hydroxy-6-(methylamino)-, disodium salt 70210-39-8 Disodium 5-((4-((2-bromo-1-oxoallyl)amino)-2-sulphonatophenyl)azo)-4-hydroxy-6-(methylamino)naphthalene-2-sulphonate EINECS 274-436-7