Used as a key intermediate in the synthesis of pharmacologically active compounds, particularly in the development of kinase inhibitors. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for modifying molecular structures in drug design. Commonly employed in the preparation of enzyme inhibitors and bioactive molecules targeting inflammatory and oncological pathways. Also utilized in labeling and derivatization processes for analytical chemistry due to its reactive functionality and stability under various reaction conditions.