This regulation establishes an exemption from the requirement of a tolerance for residues of maleic anhydride (CAS Reg. No. 108-31-6) when used as an inert ingredient (stabilizer) in pesticide formulations applied to growing crops at a maximum concentration not to exceed 3.5% by weight in the pesticide formulation. Exponent, on behalf of Cheminova A/S, submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an amendment to an existing requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of maleic anhydride.