Acrolein is a colorless, volatile liquid with a pungent odor. It is an organic compound with the chemical formula C3H4O and is primarily used in the production of acrylic acid, which is a key ingredient in various plastics and coatings. Acrolein can also be found in small amounts in cigarette smoke and is produced during the combustion of organic materials. This compound is known for its irritant properties, affecting the eyes, skin, and respiratory system. Due to its toxicity, exposure to acrolein should be minimized, especially in industrial settings. It is also used as a biocide and in the synthesis of other chemicals.