Decision document for: n-Butanol - CAS No. 71-36-3 Isobutyl Alcohol - CAS No. 78-83-1 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 n-Butanol & Isobutyl Alcohol (PDF)(29 pp, 1 MB)