Acetyl is a functional group in organic chemistry, represented by the formula C2H3O. It consists of a carbonyl group (C=O) attached to a methyl group (CH3). Acetyl is commonly found in various compounds, including acetylsalicylic acid, which is the active ingredient in aspirin, and acetylcholine, a neurotransmitter important for muscle function and memory. In addition to its role in biological systems, acetyl is used in industrial applications. It serves as a building block for synthesizing various chemicals, including acetylated starches and acetylated wood products. These applications highlight the versatility and importance of acetyl in both nature and industry.