methyl red2-((4-Dimethylamino)phenylazo)benzoic acid2-Carboxy-4'-(dimethylamino)azobenzene2-[(p-Dimethylamino)phenyl]azobenzoic acid4'-(Dimethylamino)azobenzene-2-carboxylic acid4'-Dimethylaminoazobenzene-2-carboxylic acid4-Dimethylamino-2'-carboxylazobenzeneC.I. Acid Red 2o-((p-(Dimethylamino)phenyl)azo)benzoic acido-Methyl redp-(Dimethylamino)azobenzene-o-carboxylic acid