Diisobutylaluminum hydride is widely used as a reducing agent in organic synthesis, particularly for the selective reduction of esters, nitriles, and carboxylic acids to their corresponding aldehydes. It is also employed in the reduction of epoxides to alcohols and in the hydroalumination of alkynes to form vinylalanes. Additionally, it finds application in polymerization processes, where it acts as a co-catalyst in the production of polyolefins. Its ability to provide precise control over reduction reactions makes it valuable in the synthesis of complex organic molecules, including pharmaceuticals and fine chemicals.