140942-13-8 4,4'-Bis(8-hydroxy-5-sulfo-7-quinolineazo)stilbene-2,2'-disulfonic acid tetra-Na salt 5-Quinolinesulfonic acid, 7,7'-(1,2-ethanediylbis((3-sulfo-4,1-phenylene)azo))bis(8-hydroxy-, tetrasodium salt Quinobene