This regulation establishes an exemption from the requirement of a tolerance for residues of acetone (67-64-1) when used as an inert ingredient as a solvent or co-solvent, 40 CFR 180.930, in pesticides products applied to animals. Whitmire Micro-Gen (now affiliated with BASF Corp.; 3568 Tree Court Industrial Blvd., St. Louis, MO 63112) submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of acetone.