Used primarily as an intermediate in organic synthesis, this compound plays a key role in the production of various pharmaceuticals, particularly in the creation of sulfonamide drugs, which are widely used as antibiotics and diuretics. It is also employed in the development of dyes and pigments, where its sulfonyl chloride group facilitates the introduction of sulfonamide functionalities into aromatic systems. Additionally, it serves as a reagent in the modification of polymers and resins, enhancing their properties for specific industrial applications. Its reactivity makes it valuable in research and development for synthesizing complex organic molecules.