EPA final SNURs batch 24-4.5e effective Jan 5, 2026 (Significant New Use Rules requiring SNUNs for certain new uses)

EPA finalized a set of Significant New Use Rules (SNURs) (batch 24-4.5e) covering certain chemical substances/new uses. SNURs require submitters to file a Significant New Use Notice (SNUN) before engaging in designated significant new uses, affecting manufacturing/import and downstream use planning. Compliance teams should identify whether any substances in their portfolios fall within the batch and ensure SNUN and supply-chain communication processes are in place before any covered new uses occur.