Used in organic synthesis as a reagent for introducing the 4-chlorobenzyl group into various molecules. It is particularly valuable in cross-coupling reactions, such as Negishi coupling, to form carbon-carbon bonds. This compound is also employed in the preparation of pharmaceuticals and agrochemicals, where the 4-chlorobenzyl moiety is a key structural component. Its reactivity with electrophiles makes it useful for constructing complex organic frameworks in medicinal chemistry and material science.