Aldehydes are organic compounds characterized by the presence of a carbonyl group (C=O) bonded to a hydrogen atom. This structure gives them unique chemical properties, making them important in various chemical reactions. Common examples of aldehydes include formaldehyde and acetaldehyde, which are used in industrial applications and as building blocks in organic synthesis. These compounds are often found in nature, contributing to the aroma of certain fruits and flowers. Aldehydes can also be produced through the oxidation of primary alcohols. Due to their reactivity, they play a significant role in the production of plastics, resins, and other materials.