2-Naphthalenesulfonic acid, 5-((4-(bis(2-hydroxyethyl)amino)phenyl)azo)-8-(phenylazo)-, monosodium salt 5-((4-(N,N-Bis(2-hydroxyethyl)amino)phenyl)azo)-8-(phenylazo)-2-naphthalenesulfonic acid, sodium salt 67923-60-8 EINECS 267-776-2 Sodium 5-((4-(bis(2-hydroxyethyl)amino)phenyl)azo)-8-(phenylazo)naphthalene-2-sulphonate