Used primarily as an intermediate in the synthesis 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 the development of active ingredients in crop protection agents and medicinal compounds, particularly where fluorinated aromatic structures enhance biological activity, metabolic stability, or membrane permeability. Also utilized in research settings for labeling and derivatization due to the reactivity and detectability imparted by the fluorine atom.