4,4'-((9,10-Dihydro-9,10-dioxo-1,4-anthrylene)diimino)bis(toluene-3-sulphonic) acid, sodium salt 68039-54-3 Benzenesulfonic acid, 2,2'-((9,10-dihydro-9,10-dioxo-1,4-anthracenediyl)diimino)bis(5-methyl-, sodium salt EINECS 268-267-8