Cyclopentane-1,3-dicarboxylic acid is primarily used as an intermediate in organic synthesis. It plays a key role in the production of various pharmaceuticals, where it serves as a building block for active pharmaceutical ingredients (APIs). The compound is also utilized in the development of specialty chemicals, including polymers and resins, due to its ability to introduce specific structural features into the final product. Additionally, it finds application in the creation of fine chemicals and agrochemicals, where its dicarboxylic functionality is leveraged to modify or enhance the properties of the target molecules. Its versatility in chemical reactions makes it valuable in research and industrial processes.