N-Thionylaniline is primarily used in organic synthesis as a key intermediate for the preparation of various sulfur-containing compounds. It plays a significant role in the production of pharmaceuticals, particularly in the synthesis of drugs that require thioamide or thiourea functionalities. Additionally, it is utilized in the development of agrochemicals, where it contributes to the creation of pesticides and herbicides with enhanced efficacy. In material science, N-Thionylaniline is employed in the synthesis of polymers and resins that exhibit improved thermal stability and chemical resistance. Its reactivity with other organic compounds also makes it valuable in the research and development of novel chemical entities for industrial applications.