EPA issues proposed TSCA SNURs for certain chemical substances (26–2); comments due May 26, 2026

EPA issued a proposed rule to add Significant New Use Rules (SNURs) for certain chemical substances subject to TSCA consent orders. The proposal would require companies to submit a Significant New Use Notice (SNUN) at least 90 days before manufacturing or processing for a designated significant new use. Compliance teams should identify whether any affected substances are in their portfolios and consider commenting by the deadline; if finalized, SNUN planning/lead times and use restrictions may affect R&D, scale-up, importing, and downstream customer applications.