This regulation establishes an exemption from the requirement of a tolerance for residues of 2-methyl-2,4-pentanediol (CAS Reg. No. 107-41-5) when used as an inert ingredient as a solvent in pesticide formulations 40 CFR 180.910 and 180.930 for use on crops (pre-harvest and post-harvest) and for direct application on animals without limitations. 2-methyl-2,4-pentanediol is commonly referred to as "hexylene glycol". The FB Sciences, Inc., 153 N. Main Street, Suite 100, Collierville, TN 38017 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 2-methyl-2,4-pentanediol.