The University of Iowa

SAFETYmatters - Disposing of Anesthetic Gas Absorbent Canisters

Article published 07/01/19

If you’re using anesthetic gases such as isoflurane or sevoflurane in your lab, you may also be using an absorbent canister such as VaporGuard Charcoal Filters or f/AIR canisters that contain activated carbon to prevent release of the gas to the environment. Used absorbent canisters are managed as a hazardous chemical waste.

EHS provides the waste collection service. To manage the used canisters while awaiting pickup, label the canisters as waste and store them in a sealed plastic bag or box to avoid off-gassing into the room.

Then fill out a Chemical Waste Pickup Request form. EHS will collect the canisters from your lab and dispose of them properly. There is no charge for the service.

Contact Jim Pyrz at or 5-4625 if you have questions or need assistance.