Used primarily as a key intermediate in organic synthesis, especially in the preparation of sulfonamide derivatives which are important in pharmaceutical and agrochemical industries. Its reactive sulfonyl chloride group readily forms bonds with amines, enabling the creation of bioactive molecules. Commonly employed in the development of medicinal compounds where furan-based sulfonamides exhibit antimicrobial, antifungal, or anti-inflammatory properties. Also utilized in materials science for modifying polymers and creating specialty chemicals with enhanced thermal or chemical stability. Handling requires caution due to its moisture sensitivity and potential irritant properties.