(S)-(-)-2,2'-Diamino-1,1'-binaphthalene is widely used as a chiral ligand in asymmetric synthesis. It plays a crucial role in catalyzing enantioselective reactions, such as hydrogenation, carbon-carbon bond formation, and oxidation processes, enabling the production of optically active compounds. This chemical is particularly valuable in the pharmaceutical industry for synthesizing chiral drugs with high enantiomeric purity. Additionally, it is employed in the development of chiral catalysts and materials for organic electronics, where its rigid binaphthyl structure contributes to stability and selectivity. Its application extends to analytical chemistry as a chiral selector in chromatographic separations, aiding in the resolution of enantiomers.