12225-83-1 2-Naphthalenesulfonic acid, 6-(acetylamino)-4-hydroxy-3-((3-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-, disodium salt Disodium 6-acetamido-4-hydroxy-3-((3-((2-(sulphonatooxy)ethyl)sulphonyl)phenyl)azo)naphthalene-2-sulphonate EINECS 235-431-5