Nanophase Technologies Corp. engages in the development and provision of engineered nanomaterial solutions. The firm's products include antimony tin oxide, bismuth oxide, cerium oxide, iron oxide, and zinc oxide. It serves the personal care, plastics, textiles, exterior coatings, integrated circuit and data storage, optical surface polishing, and energy markets. The company was founded by Richard W. Siegel in 1989 and is headquartered in Romeoville, IL.