Triethylsilane is widely used as a reducing agent in organic synthesis, particularly for the reduction of carbonyl compounds, such as aldehydes and ketones, to their corresponding alcohols under specific catalytic conditions. It is also employed in deoxygenation reactions, converting functional groups like alcohols and carbonyls to methylene groups when used with Lewis acids. Additionally, it facilitates the deprotection of certain protecting groups in organic chemistry, allowing selective transformations.

In the field of polymer chemistry, triethylsilane is utilized as a cross-linking agent and for modifying the surface properties of polymers. It helps in enhancing the thermal stability and mechanical strength of materials.

Additionally, triethylsilane finds application in the production of silicon-based materials, including silicones and silane coupling agents, which are essential in coatings, adhesives, and sealants. Its role in hydrosilylation reactions is also significant, where it contributes to the formation of silicon-carbon bonds, a key step in the synthesis of various organosilicon compounds.

In the pharmaceutical industry, triethylsilane is used in the synthesis of active pharmaceutical ingredients (APIs) and intermediates, particularly in reactions requiring mild and selective reducing conditions. Its versatility and efficiency make it a valuable reagent in both academic research and industrial applications.