Used as a key intermediate in the synthesis of agrochemicals and pharmaceuticals, particularly in the development of herbicides and plant growth regulators. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for introducing the 4-chloropyridine moiety into larger molecules. It is also employed in the preparation of sulfonamide derivatives, which exhibit biological activity in crop protection agents. Due to its reactivity, it enables efficient construction of sulfonate esters and sulfonamides used in medicinal chemistry and pesticide research.