Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactive sulfonyl chloride group allows for easy attachment to amines or alcohols, forming sulfonamides or sulfonate esters, which are common motifs in bioactive molecules. Particularly valuable in the development of fluorinated compounds, where the fluorine atom enhances metabolic stability and membrane permeability. Commonly employed in the preparation of kinase inhibitors and other medicinal agents targeting inflammatory and oncological pathways. Also utilized in the fabrication of specialty polymers and functional materials requiring defined electronic or structural properties.