164416-13-1 4,4'-Bis(2-carboxy-4,6-dihydroxyphenylazo)stilbene-2,2'-disulfonic acid tetrasodium salt Benzoic acid, 2,2'-((1E)-1,2-ethenediylbis((1E)-(3-sulfo-4,1-phenylene)azo))bis(3,5-dihydroxy-, tetrasodium salt Benzoic acid, 2,2'-(1,2-ethenediylbis((3-sulfo-4,1-phenylene)azo))bis(3,5-dihydroxy-, tetrasodium salt, (E,E,E)- Resobene