25712-08-7 3,3'-(Carbonylbis(imino(3-methoxy-p-phenylene)azo))bis(benzenesulphonic) acid Benzenesulfonic acid, 3,3'-(carbonylbis(imino(3-methoxy-4,1-phenylene)azo))bis- Benzenesulfonic acid, 3,3'-(ureylenebis((3-methoxy-p-phenylene)azo))di EINECS 247-203-2