Final SNUR batch published Nov. 4, 2025 (effective Jan. 5, 2026) — Significant New Use Notice (SNUN) requirements for certain chemical substances

EPA finalized a batch of Significant New Use Rules (SNURs) under TSCA Section 5, establishing significant new uses that trigger Significant New Use Notice (SNUN) obligations before manufacture, import, or processing for those uses can begin. This is a binding regulatory change for entities handling covered substances, requiring screening of uses against the SNUR conditions and updating internal new-use change-management to ensure SNUN submissions occur before initiating any designated significant new use. The research notes the final SNUR batch was published Nov. 4, 2025 and became effective Jan. 5, 2026.