Triethylborane is widely used as a catalyst and reagent in organic synthesis. It plays a crucial role in polymerization reactions, particularly in the production of polyolefins like polyethylene and polypropylene. The compound is also employed in hydroboration reactions, where it facilitates the addition of boron and hydrogen across double bonds in alkenes, leading to the formation of organoboron compounds. These intermediates are valuable in further synthetic transformations, such as Suzuki-Miyaura cross-coupling reactions, which are essential in pharmaceutical and materials science research. Additionally, triethylborane is utilized in radical chemistry as an initiator for radical polymerization processes, enabling the creation of various polymers with specific properties. Its ability to act as a reducing agent in certain chemical reactions further expands its utility in organic and industrial chemistry.