Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of nicotinamide and vitamin B3 derivatives. Commonly employed in the preparation of agrochemicals, including herbicides and plant growth regulators. Serves as a building block in the development of ligands for catalysis, especially in transition metal-catalyzed reactions. Applied in the manufacture of functionalized polymers and specialty resins due to its reactivity with nucleophiles. Also utilized in the creation of pyridinium salts, which have applications as ionic liquids and phase-transfer catalysts.