13520-96-2 5-22-14-00637 (Beilstein Handbook Reference) BRN 0482138 N,N-Dimethyl-4-(4'(pyridyl-1'-oxide)azo)aniline NSC 170631 Pyridine, 4-((p-(dimethylamino)phenyl)azo)-, 1-oxide (8CI) Pyridine-1-oxide, 4-(p-(dimethylamino)phenylazo)- Pyridine-1-oxide-4-azo-p-dimethylaniline