Methacrolein is one of two major products resulting from the reaction of isoprene with OH in the atmosphere, the other product being methyl vinyl ketone (MVK, also known as butenone).

[1] These compounds are important components of the atmospheric oxidation chemistry of biogenic chemicals, which can result in the formation of ozone and/or particulates.

[2] It can be found in the essential oil of the plant Big Sagebrush (Artemisia tridentata) which contains 5% methacrolein.

[3] Industrially, the primary use of methacrolein is in the manufacture of polymers and synthetic resins.

Exposure to methacrolein is highly irritating to the eyes, nose, throat and lungs.