5-Phenylvaleric acid is primarily utilized in organic synthesis as a building block for the production of various pharmaceutical compounds. It serves as an intermediate in the synthesis of active pharmaceutical ingredients (APIs) and is often employed in the development of drugs targeting neurological and cardiovascular disorders. Additionally, it is used in the preparation of fine chemicals and specialty materials, contributing to the creation of polymers and other advanced materials. Its aromatic phenyl group and carboxylic acid functionality make it a versatile reagent in chemical transformations, enabling the formation of complex molecular structures.