C3H4O2 An attenuating agent
The vapor is very irritating and the liquid form is carcinogenic. Propiolactone is “reasonably expected to be a human carcinogen.” (IARC 1999)Recognized – carcinogen, Suspected – gastrointestinal or liver toxicant, respiratory toxicant, skin or sense organ toxicant. More hazardous than most chemicals in 3 out of 3 ranking systems. On at least 5 federal regulatory lists. Ranked as one of the most hazardous compounds (worst 10%) to humans. Propiolactone was once widely used in the manufacture of acrylic acid and its esters, but its use has been mostly phased out in favor of safer and less expensive alternatives.
National Library of Medicine: PubChem
Scorecard: Pollution Information Site
a.k.a. 2-oxatanone Propiolactone, â-propiolactone, 2-oxatanone, Propiolactone