(S,S)-N-(p-Toluenesulfonyl)-1,2-diphenylethanediamine(chloro)(p-cymene)ruthenium(II) is a complex compound containing a ruthenium(II) center coordinated with a chiral ligand derived from 1,2-diphenylethanediamine, tosyl chloride, chloro ligand, and p-cymene. Its chemical formula is RuCl(p-cymene)(TsDPEN). This complex is utilized in asymmetric catalysis due to its ability to induce chirality in various reactions, particularly in asymmetric hydrogenation and other enantioselective transformations.