Used primarily as an intermediate in the synthesis of sulfonamide-based pharmaceuticals. It plays a key role in developing biologically active compounds, especially in the production of antimicrobial and antifungal agents. Its sulfonyl chloride group readily reacts with amines, enabling the formation of sulfonamide derivatives that are common structural motifs in drug design. It is also employed in the preparation of agrochemicals and dyes where thiazole and sulfone functionalities enhance stability and reactivity. Due to its functional group compatibility, it serves as a building block in heterocyclic chemistry for creating complex molecules with tailored biological activity.