Zincon sodium salt hydrate, Reag.

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