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