Ethanal, also called acetaldehyde, is a chemical compound. It is a colorless and volatile liquid component that is particularly reactive and inflammable. Ethanal is naturally present in tobacco, oak leaves, ripe fruit, and coffee. It has toxic and carcinogenic properties, especially in animals. In its hydrogenated form it produces ethanol, the principal psychotropic substance in alcoholic drinks. It is one of the accumulated factors of cancer risk tied to alcohol consumption.