Several key issues have emerged as pivotal in ongoing efforts to reform TSCA. Progress on these complex issues is central to the success of TSCA reform. As part of its ongoing series on TSCA reform priorities and challenges, on October 4, 2011, ELI convened a panel of experts to discuss reform related to prioritizing chemicals for regulation. The panel reviewed current EPA, state, and international initiatives for purposes of assessing the feasibility of various approaches. Topics addressed included criteria (hazard/exposure/risk), procedures for identification of chemicals, and the scope of regulatory authority to require alternatives and other actions.