1325-16-2 Barium(2+) hydrogen 2-((2-hydroxy-3,6-disulphonato-1-naphthyl)azo)benzoate Benzoic acid, 2-((2-hydroxy-3,6-disulfo-1-naphthalenyl)azo)-, barium salt (1:2) Benzoic acid, 2-[(2-hydroxy-3,6-disulfo-1-naphthalenyl)azo]-, barium salt (1:2) EINECS 215-388-9