Sodium cyanoborohydride is widely used as a selective reducing agent in organic synthesis, particularly for reductive amination reactions. It effectively reduces imines and enamines to their corresponding amines without affecting other functional groups, making it valuable in the production of pharmaceuticals and fine chemicals. In biochemistry, it is employed for the stabilization of Schiff bases during protein labeling and cross-linking experiments. Additionally, it is utilized in the synthesis of complex molecules, such as carbohydrates and nucleosides, due to its mild reducing properties. Its stability in aqueous solutions also makes it suitable for use in various biochemical and industrial applications.