N-Phenylsuccinimide is primarily used as an intermediate in the synthesis of various organic compounds, particularly in the production of pharmaceuticals and agrochemicals. It plays a significant role in the development of anticonvulsant drugs, where it serves as a key building block for creating compounds that help manage epilepsy and other seizure disorders. Additionally, it is utilized in the preparation of dyes and pigments, contributing to the coloration of textiles and other materials. Its application extends to the field of polymer chemistry, where it is involved in the modification of polymers to enhance their properties, such as thermal stability and mechanical strength. In research, N-Phenylsuccinimide is often employed as a reagent in organic synthesis to facilitate the formation of complex molecules.