EPA proposes TSCA Section 5 Significant New Use Rules (SNURs) for certain chemical substances (26-2); comments due May 26, 2026

EPA published a proposed rule to establish Significant New Use Rules (SNURs) for certain chemical substances (SNUR batch 26-2). If finalized, manufacturers and processors would be required to submit a Significant New Use Notice (SNUN) at least 90 days before commencing any activity designated as a significant new use (generally, activities not consistent with protective measures in underlying TSCA §5 orders). Compliance teams should determine whether any portfolio substances or planned uses could be affected and consider submitting comments by the stated deadline.