Nanophase Technologies Corporation engages in the development, manufacture, and sale of engineered nanomaterial products primarily in North America. The company's products are used in various markets, including sunscreens, architectural coatings, industrial coatings ingredients, personal care, abrasion-resistant applications, antimicrobial products, plastics additives, and medical diagnostics, as well as for a range of polishing applications consisting of semiconductors and optics. It also provides a nanoengineered product line under the trade name NanoUltra for the architectural window cleaning market. Nanophase Technologies Corporation was founded in 1989 and is headquartered in Romeoville, Illinois.