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 benzaldehyde, which are used in industries ranging from manufacturing to food preservation. 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 organic synthesis and are used in the production of plastics, resins, and perfumes.