Used primarily as a reagent in organic synthesis, particularly for the preparation of sulfonamides. It is employed in the modification of peptides and proteins, enabling the introduction of sulfonamide groups into biomolecules. This chemical is also utilized in the development of pharmaceuticals, where it serves as a key intermediate in the synthesis of drug candidates. Additionally, it finds application in the creation of dyes and pigments, contributing to the production of colorants with specific properties. Its reactivity with amines makes it valuable in the preparation of various sulfonamide derivatives used in research and industrial processes.