92076-94-3 Benzoic acid, 3,3'-(1,3-phenylenebis(azo(4,6-diamino-3,1-phenylene)azo(sulfo-4,1-naphthalenediyl)azo-4,1-phenyleneiminocarbonyl-4,1-phenyleneazo))bis(6-hydroxy-, tetrasodium salt