Used as a key reagent in organic synthesis, particularly in radical reactions. It serves as a source of pyridin-3-yl radicals, enabling the introduction of pyridyl groups into various organic molecules. This is especially valuable in pharmaceutical and agrochemical industries for constructing complex heterocyclic compounds. Its role in metal-free C–H pyridylation makes it useful for modifying bioactive molecules under mild conditions. Also employed in polymer chemistry to initiate specific radical polymerizations.