Synonyms: barium 3-[(2-hydroxynaphthyl)azo]naphthalene-1,5-disulphonate;2-[(2-Hydroxy-1-naphtyl)azo]-4,8-naphthalenedisulfonic acid barium salt;3-[(2-Hydroxy-1-naphthalenyl)azo]-1,5-naphthalenedisulfonic acid barium salt;1,5-Naphthalenedisulfonic acid, 3-((2-hydroxy-1-naphthalenyl)azo)-, barium salt (1:1);1,5-Naphthalenedisulfonic acid, 3-(2-(2-hydroxy-1-naphthalenyl)diazenyl)-, barium salt (1:1);Einecs 268-056-0