One year after accepting a government challenge to work toward eliminating the use of a potentially dangerous chemical used to make Teflon and other products, the DuPont Co. has said it plans to stop using the chemical by 2015.

The Environmental Protection Agency asked the Wilmington, Del.-based chemical giant and seven other companies last year to commit to a 95 percent reduction in environmental emissions and product content levels of perfluorooctanoic acid, or PFOA, and associated chemicals by 2010.