Used as a key intermediate in organic synthesis, particularly in Wittig reactions to form α,β-unsaturated carbonyl compounds. It enables the construction of conjugated alkenes by reacting with aldehydes or ketones, making it valuable in the synthesis of complex molecules such as natural products, pharmaceuticals, and fine chemicals. Its phosphorane group facilitates carbon-carbon bond formation under mild conditions, offering good selectivity and yield. Commonly employed in research laboratories for building extended π-systems and in the development of functional organic materials.