Decision document for: Methyl n-Amyl Ketone - CAS No. 110-43-0 Methyl Ethyl Ketone - CAS No. 78-93-3 Methyl Isobutyl Ketone - CAS No. 108-10-1 You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more. Inert Reassessment Decision Document for Methyl n-Amyl Ketone, Methyl Ethyl Ketone, and Methyl Isobutyl Ketone (PDF)(20 pp, 1 MB)