15782-06-6 Barium 2-((2-hydroxy-3,6-disulphonato-1-naphthyl)azo)benzoate (3:2) Benzoic acid, 2-((2-hydroxy-3,6-disulfo-1-naphthalenyl)azo)-, barium salt (2:3) EINECS 239-880-8