Syonyms Name: 1-Naphthalenesulfonic acid, 2-(2-(1-hydroxy-2-naphthalenyl)diazenyl)-, barium salt (2:1); 2-((1-Hydroxy-2-naphthalenyl)azo)-1-naphthalenesulfonic acid, barium salt (2:1); 1-Naphthalenesulfonic acid, 2-((1-hydroxy-2-naphthalenyl)azo)-, barium salt (2:1); B