Used primarily as an intermediate in organic synthesis, especially in the development of pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide and sulfonate ester derivatives. Commonly employed in medicinal chemistry for modifying bioactive molecules, it aids in enhancing metabolic stability and binding affinity. Also utilized in the preparation of kinase inhibitors and other biologically active compounds. Its indazole core contributes to improved pharmacokinetic properties in drug design.