What does propenal mean?
Propenal is the systematic chemical name for acrolein, an organic compound also called prop-2-enal and represented by the formula CH₂=CH–CHO. It is an unsaturated aldehyde, meaning that it contains both an aldehyde group and a carbon–carbon double bond. Pure propenal is a colorless, volatile liquid with a sharp, unpleasant odor, although the compound is often encountered as part of smoke or exhaust rather than in isolation. It can be produced during the heating or combustion of unsaturated organic materials, including fats and plastics, and exposure can irritate the eyes and respiratory tract. As a result, propenal appears in discussions of industrial emissions, indoor air, tobacco smoke, and workplace hazards. Acrolein remains the name most commonly used by general references, while propenal emphasizes the compound’s systematic chemical structure. Both names refer to the same substance and should not be treated as different chemicals.
nounPropenal is the IUPAC systematic name for acrolein, the organic compound CH₂=CH–CHO that is also known as prop-2-enal. It is a colorless, volatile liquid with a pungent odor and is a common constituent of smoke and industrial chemical processes.
- The organic compound CH₂=CH–CHO, also called acrolein or prop-2-enal.
"The laboratory identified propenal among the volatile compounds released by the heated material."
"Acrolein, or propenal, is formed when unsaturated fats undergo severe heating."
"The report detected propenal in air samples collected near the industrial site."
Propenal, better known as acrolein, is the sharp chemical warning associated with smoke, burning plastic, and overheated cooking oils.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does propenal come from?
The name is formed according to IUPAC nomenclature from prop-, indicating a three-carbon parent chain, and -enal, the suffix used for an unsaturated aldehyde. Its more familiar name, acrolein, comes through French from Greek akro-, ‘top’ or ‘extreme’, and the suffix -olein. The systematic name prop-2-enal identifies the aldehyde group at one end of the chain and the double bond between the second and third carbon atoms.
How propenal is actually used
Propenal is chiefly a technical or systematic name used in chemistry, toxicology, and environmental or occupational health. Acrolein is more familiar in general and safety literature.
Easily confused with propenal
Propenal is an unsaturated aldehyde containing a carbon–carbon double bond, whereas propanal is the saturated aldehyde CH₃CH₂CHO.
Propenal is an aldehyde, while propylene is an alkene used as a separate industrial chemical.