Sodium triethylborohydride is widely used as a selective reducing agent in organic synthesis. It is particularly effective in reducing carbonyl compounds, such as ketones and aldehydes, to their corresponding alcohols. Its strong reducing properties also make it useful in the reduction of imines, esters, and other functional groups. Additionally, it is employed in the preparation of organoboron compounds, which are valuable intermediates in various chemical reactions. In pharmaceutical manufacturing, it plays a role in the synthesis of complex molecules by facilitating precise reductions. Its ability to operate under mild conditions makes it a preferred choice for sensitive reactions.