Modification of Significant New Uses of Certain Chemical Substances

EPA is proposing to amend the significant new use rules (SNURs) under section 5(a)(2) of the Toxic Substances Control Act (TSCA) for 24 chemical substances which were the subject of premanufacture notices (PMNs). This action would amend the SNURs to allow certain uses without requiring a significant new use notice (SNUN), and would extend SNUN requirements to certain additional uses. EPA is proposing these amendments based on review of new data as described for each chemical substance. This action would requires persons who intend to manufacture (including import) or process any of these 24 chemical substances for an activity that is designated as a significant new use by this proposed rule to notify EPA at least 90 days before commencing that activity. The required notification would provide EPA with the opportunity to evaluate the intended use and, if necessary, to prohibit or limit that activity before it occurs.