Used as a reducing agent in organic synthesis, particularly for selective reductions of aldehydes, ketones, and imines. It is effective in transferring hydride to electrophilic centers under mild conditions. Its quaternary ammonium cation enhances solubility in polar organic solvents, making it useful in non-aqueous reaction environments. Also employed in the preparation of fine chemicals and pharmaceuticals where controlled reduction is required. Shows lower reactivity toward esters and amides compared to other borohydride reagents, allowing for chemoselective transformations.