An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Inert Reassessment Document for Butane

: Propane and butane are used as propellants for aerosol shaving creams, skin fresheners, makeup, hair conditioners, deodorants, cosmetics and personal hygiene products. As inert ingredients in pesticide products, propane and butane are also used as propellants. 

  • Butane  - CAS No. 106-97-8
  • Propane - CAS No. 74-98-6
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.