Dicarboxylic acids are organic compounds that contain two carboxyl functional groups (-COOH) in their molecular structure. These acids can be found in various natural sources and are important in many biological processes. Common examples include oxalic acid, succinic acid, and adipic acid. These acids are typically weak acids and can participate in various chemical reactions, such as esterification and polymerization. Dicarboxylic acids are used in the production of plastics, resins, and other industrial materials, making them significant in both chemistry and manufacturing.