2-[1-(2-Hydroxy-5-sulfophenyl)-3-phenyl-5-formazano]-benzoic acid

o-[α-(2-hydroxy-5-sulfophenyl) azo] benzylidene ; 2-[1-(2-hydroxy-5-sulfophenyl)-3-phenyl-5-formazano]-benzoicacid ; zincon sodium salt hydrate ; zincon, for the photometric determination of copper and zinc ; zincon hydrate sodium salt ; 2-carboxy-2'-hydroxy-5'-sulfoformazylbenzene ; 2-[1-(2-hydroxy-5-sulphophenyl)-3-phenyl-5-formazano]benzoic acid ; zincongr ; zincon ; 2-[1-(2-hydroxy-5-sulfophenyl)-3-phenyl-5-formazano]-benzoicaci