Used primarily in organic synthesis as an alkylating agent for introducing pyridine moieties into target molecules. It is especially valuable in the preparation of ligands for metal catalysts and in the development of functionalized heterocyclic compounds. Commonly employed in the synthesis of pharmaceutical intermediates due to its ability to selectively modify amines and other nucleophiles. Also utilized in the production of specialty polymers and in biochemical research for labeling or modifying biomolecules. Its reactivity with nucleophiles makes it suitable for constructing complex molecular architectures in medicinal chemistry.