Used as a key reagent in organic synthesis, particularly in the Wittig reaction, to convert aldehydes and ketones into α,β-unsaturated nitriles. This transformation is valuable for building carbon-carbon double bonds adjacent to nitrile groups, which are versatile intermediates in the synthesis of pharmaceuticals, agrochemicals, and functional materials. The presence of the cyanomethyl group allows for further chemical modifications, such as hydrolysis to carboxylic acids or reduction to primary amines, enabling diverse molecular constructions. Its stability and reactivity profile make it suitable for use in both academic research and industrial-scale synthetic routes.