Dicarboxylic acids are organic compounds that contain two carboxyl (-COOH) functional groups. 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. They play a significant role in the synthesis of polymers and other chemical products. These acids can be classified based on the number of carbon atoms in their chain, such as malonic acid with three carbons or sebacic acid with ten. Dicarboxylic acids are also used in the production of food additives, pharmaceuticals, and biodegradable plastics, highlighting their versatility in industrial applications.