17814-20-9 2-Naphthalenecarboxylic acid, 4-((4-chloro-5-methyl-2-sulfophenyl)azo)-3-hydroxy-, barium salt (1:1) Barium 4-((4-chloro-5-methyl-2-sulphonatophenyl)azo)-3-hydroxy-2-naphthoate EINECS 241-780-4