CH2CHCHCHCHO

CH2CHCHCHCHO, also known as crotonaldehyde, is an organic compound with the chemical formula C4H6O. It is an unsaturated aldehyde, meaning it contains both a carbon-carbon double bond and an aldehyde functional group. Crotonaldehyde is a colorless to yellowish liquid with a pungent, acrid odor. It is soluble in water and many organic solvents.

This compound exists as two geometric isomers: trans-crotonaldehyde and cis-crotonaldehyde. The trans isomer is more common and stable. Crotonaldehyde is produced industrially through the aldol condensation of acetaldehyde. It is a reactive molecule due to the presence of both the double bond and the aldehyde group, making it susceptible to various chemical reactions such as oxidation, reduction, and addition reactions.

Crotonaldehyde is primarily used as an intermediate in the synthesis of other chemicals. It is employed in the production of sorbic acid, a common food preservative, and in the manufacture of pharmaceuticals, perfumes, and dyes. It can also be used as a fumigant and an insecticide. Due to its irritant and toxic properties, crotonaldehyde requires careful handling and is classified as a hazardous substance. Exposure can cause severe irritation to the eyes, skin, and respiratory tract.