4'-Sulfo-N,N-dimethyl-4-aminoazobenzene 4-((4-(Dimethylamino)phenyl)azo)benzenesulphonic acid 4-(4-Dimethylaminophenylazo)benzenesulfonic acid 4-(4-Sulfophenylazo)-N,N-dimethylaniline 4-(Dimethylamino)azobenzene-4'-sulfonic acid 502-02-3 547-58-0 Benzenesulfonic acid, 4-((4-(dimethylamino)phenyl)azo)- Benzenesulfonic acid, p-((p-(dimethylamino)phenyl)azo)- (8CI) EINECS 207-932-9 Methyl orange Methyl orange (acid form) NSC 9595 p-((p-(Dimethylamino)phenyl)azo)benzenesulfonic acid