2-Naphthalenesulfonic acid, 4-hydroxy-7-((1-oxodecyl)amino)- 4-Hydroxy-7-((1-oxodecyl)amino)naphthalene-2-sulphonic acid 68189-33-3 7-Decanamido-4-hydroxynaphthalene-2-sulfonic acid EINECS 269-190-2