but2enal

Crotonaldehyde, also known as but-2-enal, is an organic compound with the chemical formula C4H6O. It is a clear, flammable liquid with a pungent, irritating odor. Crotonaldehyde belongs to the class of compounds known as alpha,beta-unsaturated aldehydes. It exists as both cis and trans isomers, with the trans isomer being more common and stable.

The compound can be synthesized through various methods, including the aldol condensation of acetaldehyde. It is an important intermediate in the synthesis of other organic chemicals, such as vitamin A, sorbic acid, and various pharmaceuticals. Crotonaldehyde is also used as a cross-linking agent in the production of certain polymers and resins.

Due to its reactive nature, crotonaldehyde is a strong irritant to the skin, eyes, and respiratory tract. Exposure can cause coughing, shortness of breath, and inflammation. It is classified as a toxic substance and requires careful handling and appropriate safety precautions. In industrial settings, measures are taken to minimize worker exposure and prevent environmental release.