Used as a chiral catalyst in asymmetric synthesis, particularly in the production of enantiomerically pure pharmaceuticals. It plays a key role in organocatalysis, such as in the asymmetric alkylation of carbonyl compounds. Also employed in the resolution of racemic mixtures due to its ability to form diastereomeric salts with chiral acids. Additionally, it serves as a ligand in metal-catalyzed reactions, enhancing stereoselectivity. Historically used in analytical chemistry for the detection and determination of certain metal ions.