Used as a key intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It is often employed in the creation of sulfonamide derivatives, which are crucial for developing antibacterial and antifungal agents. Additionally, it serves as a building block in the synthesis of complex molecules for drug discovery and development. Its reactive sulfonyl chloride group allows for efficient coupling with amines or other nucleophiles, making it valuable in medicinal chemistry and material science research.