Used as an intermediate in the synthesis of agrochemicals and pharmaceuticals, particularly in the development of herbicides and plant growth regulators. Its sulfonic acid group enhances water solubility, making it suitable for formulations requiring high solubility in aqueous systems. Also employed in the preparation of catalysts and ligands for metal-catalyzed reactions. Its chloro-substituted pyridine ring allows for further functionalization via nucleophilic substitution, enabling its use in multi-step organic syntheses.