Dimethylpolysiloxane in Pesticide Formulations; Exemption From the Requirement for a Tolerance

Document 2026-05773 is a Final Rule published by the Environmental Protection Agency in the Federal Register on March 25, 2026, with an effective date of March 25, 2026. This regulation establishes an exemption from the requirement of a tolerance for residues of methyl end-capped polydimethylsiloxane (CAS Reg. No 63148-62-9); also known as dimethylpolysiloxane when used as an inert ingredient in a pesticide chemical formulation under 40 CFR 180.960. Momentive Performance Materials, Inc submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of methyl end-capped polydimethylsiloxane on food or feed commodities when used in accordance with these exemptions. View the original at https://www.federalregister.gov/documents/2026/03/25/2026-05773/dimethylpolysiloxane-in-pesticide-formulations-exemption-from-the-requirement-for-a-tolerance.

No. Document 2026-05773 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.