Used as a key intermediate in organic synthesis, particularly in the preparation of sulfonamide derivatives. These derivatives are essential in the development of pharmaceuticals, including antibacterial and antiviral agents. It is also employed in the creation of agrochemicals, such as herbicides and pesticides, due to its reactivity with various organic compounds. Additionally, it serves as a building block in the synthesis of complex molecules for research and industrial applications, including materials science and chemical biology. Its sulfonyl chloride group allows for versatile functionalization, making it valuable in coupling reactions and the modification of biomolecules.