Under the Toxic Substances Control Act (TSCA), as amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act, EPA evaluates potential risks from new and existing chemicals and acts to address any unreasonable risks chemicals may have on human health and the environment. Use this site to get information on how EPA reviews new and existing chemicals, view our major milestones in implementing amended TSCA, learn more about specific chemicals, and find other TSCA-related resources.