17852-98-1 2-Naphthalenecarboxylic acid, 3-hydroxy-4-((4-methyl-2-sulfophenyl)azo)-, barium salt (1:1) Barium 3-hydroxy-4-((4-methyl-2-sulphonatophenyl)azo)-2-naphthoate D And C Red No. 6, barium lake EINECS 241-806-4