 Barium 4-3-chloro-2-methyl-5-sulfonatophenylazo-3-hydroxy-2-naphthoate2-Naphthalenecarboxylic acid, 4-3-chloro-2-methyl-5-sulfophenylazo-3-hydroxy-, barium salt 1:1C18H13ClN2O6S.Ba67892-41-5267-573-9 