2-Anthracenesulfonic acid, 4,4'-(methylenebis(4,1-phenyleneimino))bis(1-amino-9,10-dihydro-9,10-dioxo- 31353-92-1 4,4'-(Methylenebis(4,1-phenyleneimino))bis(1-amino-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic) acid EINECS 250-583-2 Methane, bis(4-(4-amino-3-sulfo-1-anthraquinonylamino)phenyl)-, disodium salt