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EPA Finalizes Pesticide Tolerances for Hydrogen Cyanide, Naphthaleneacetic Acid, Carboxin, Ethofumesate, Thiobencarb, and Propylene Oxide Under FFDCA

The EPA is finalizing pesticide tolerance actions for six active ingredients—hydrogen cyanide, 1-naphthaleneacetic acid, carboxin, ethofumesate, thiobencarb, and propylene oxide—following registration review conducted under FIFRA. The rule establishes or modifies tolerance levels (legal limits for pesticide chemical residues in or on food) under FFDCA section 408(e), effective April 22, 2026. Affected parties may file objections or request hearings by June 22, 2026.

Final Rule: Pesticide Tolerance Actions for Six Active Ingredients Under Registration Review

EPA is finalizing tolerance actions for six pesticide active ingredients—hydrogen cyanide, 1-naphthaleneacetic acid, carboxin, ethofumesate, thiobencarb, and propylene oxide—under registration review conducted pursuant to FIFRA. The final rule establishes modifications to tolerance levels codified at 40 CFR 180.130, 180.155, 180.301, 180.345, 180.401, and 180.491. Affected parties include crop producers (NAICS 111), animal producers (NAICS 112), food manufacturers (NAICS 311), and pesticide manufacturers (NAICS 32532). Objections and hearing requests must be received on or before June 22, 2026 in accordance with 40 CFR part 178.