CAS Registry Number

CAS 29841-69-8 — 1S,2S)-(-)-1,2-Diphenylethylenediamine

**(1S,2S)-(-)-1,2-Diphenylethylenediamine** is a chiral diamine widely used as a ligand in asymmetric catalysis, particularly in hydrogenation and hydrosilylation reactions, and as a resolving agent for enantiomeric separations. It appears as a white crystalline solid with a melting point of 128–132 °C and is soluble in organic solvents like ethanol and dichloromethane. The enantiomerically pure form (CAS 29841-69-8) carries no signal word under EU CLP, indicating low acute hazard. Molekula supplies (1S,2S)-(-)-1,2-Diphenylethylenediamine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.