Used as a chiral resolving agent in the separation of enantiomers, particularly in the pharmaceutical industry for purifying optically active compounds. Its structural features allow it to form stable diastereomeric salts with racemic mixtures of acidic or basic drugs, facilitating crystallization-based separation. Commonly applied in the resolution of biologically active amines and carboxylic acids where high enantiomeric purity is required. Also employed in asymmetric synthesis as a chiral auxiliary or counterion to influence stereoselectivity in key reaction steps.