2-Naphthalenesulfonic acid, 6-amino-5-((2-((ethylphenylamino)sulfonyl)phenyl)azo)-4-hydroxy-, monosodium salt 6-Amino-5-((2-((ethylphenylamino)sulfonyl)phenyl)azo)-4-hydroxy-2-naphthalenesulfonic acid, monosodium salt 6-Amino-5-((2-((ethylphenylamino)sulfonyl)phenyl)azo)-4-hydroxy-2-naphthalenesulfonic acid, sodium salt 70865-30-4 EINECS 274-958-5 Sodium 6-amino-5-((2-((ethylphenylamino)sulphonyl)phenyl)azo)-4-hydroxynaphthalene-2-sulphonate