Tetrabutylammonium borohydride is widely used as a selective reducing agent in organic synthesis. It is particularly effective in reducing carbonyl compounds, such as aldehydes and ketones, to their corresponding alcohols. Its ability to function in both aqueous and organic solvents makes it versatile for various reaction conditions. Additionally, it is employed in the reduction of imines and oximes, facilitating the formation of amines. In peptide chemistry, it is utilized for the reduction of disulfide bonds, aiding in the structural analysis of proteins. Its application extends to the synthesis of fine chemicals and pharmaceuticals, where precise and controlled reduction reactions are essential. The compound is also used in the preparation of metal nanoparticles, where it acts as a stabilizing and reducing agent, ensuring the formation of uniform and well-defined particles.