2-Naphthalenesulfonic acid, 7,7'-(azobis(4,1-phenylenecarbonylimino))bis(4-hydroxy-3-((2-hydroxy-5-(methylsulfonyl)phenyl)azo)-, disodium salt 7,7'-(Azobis(4,1-phenylenecarbonylimino))bis(4-hydroxy-3-((2-hydroxy-5-(methylsulfonyl)phenyl)azo)-2-naphthalenesulfonic acid, disodium salt 70210-36-5 Disodium 7,7'-(azobis(4,1-phenylenecarbonylimino))bis(4-hydroxy-3-((2-hydroxy-5-(methylsulphonyl)phenyl)azo)naphthalene-2-sulphonate) EINECS 274-433-0