2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis(3-((4-(acetylamino)phenyl)azo)-4-hydroxy-, sodium salt 7,7'-(Carbonyldiimino)bis(3-((4-(acetamido)phenyl)azo)-4-hydroxynaphthalene-2-sulphonic) acid, sodium salt 83232-28-4 EINECS 280-260-1