This chemical is primarily used in organic synthesis as a reactive intermediate for the preparation of more complex molecules. Its functional groups, including the chlorocarbonyl and sulfonic acid moieties, make it suitable for coupling reactions, particularly in the development of polymers and specialty chemicals. It is often employed in the production of advanced materials, such as photosensitive resins used in photolithography for semiconductor manufacturing. Additionally, it can serve as a building block in the synthesis of pharmaceuticals, where its structure allows for the introduction of specific functional groups to enhance drug activity or stability. Its application is also seen in the field of dye chemistry, where it contributes to the creation of sulfonated dyes with improved solubility and binding properties.