4-(p-Dimethylaminophenylazo)benzenearsonic acid hydrochloride 73688-85-4 Arsonic acid, (4-((4-(dimethylamino)phenyl)azo)phenyl)-, monohydrochloride (9CI) Benzenearsonic acid, 4-(p-dimethylaminophenylazo)-, hydrochloride NSC 148368