Used as a reagent in organic synthesis, particularly in Wittig reactions to form carbon-carbon double bonds. It is effective in the preparation of alkenes from aldehydes or ketones, especially in the synthesis of complex natural products and pharmaceuticals. Its structure allows for selective olefination of carbonyl compounds, making it valuable in the development of fine chemicals and bioactive molecules. Commonly employed in research settings for the construction of conjugated systems and methoxy-substituted olefins.