Used primarily as an intermediate in the synthesis of agrochemicals and pharmaceuticals. 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 herbicides and plant growth regulators due to the pyridine ring’s bioactivity. Also utilized in medicinal chemistry for designing kinase inhibitors and other biologically active molecules. Its chlorinated structure enhances reactivity and facilitates further functionalization in multi-step organic syntheses.