Sodium cyanoborohydride is widely used as a selective reducing agent in organic synthesis. It is particularly effective in reductive amination reactions, where it reduces imines or enamines to amines without affecting other functional groups such as carbonyls. This makes it valuable in the production of pharmaceuticals, where precise reduction is crucial. It is also employed in the synthesis of peptides and proteins, helping to stabilize intermediates during the process. Additionally, it is used in the reduction of oximes to primary amines. Its mild reducing properties make it suitable for applications in biochemistry and materials science, where controlled reduction is required.