Used as a Grignard reagent in organic synthesis, this compound serves as a source of nucleophilic alkynyl groups. It reacts with carbonyl compounds such as aldehydes, ketones, and esters to form new carbon-carbon bonds, enabling the construction of complex organic molecules. Commonly applied in the synthesis of propargylic alcohols, carboxylic acids, and extended hydrocarbon chains featuring triple bonds in pharmaceuticals, agrochemicals, and fine chemicals. The reactivity allows for chain elongation and functional group transformations under anhydrous conditions.