CAS# 94041-18-6. 1g. (S)-[1,1'-Binaphthalene]-2,2'-diylbis[1,1-diphenyl-1,1'-phosphine oxide], 98% (99% ee). Molecular Weight: 654.69. Molecular Formula: C44H32O2P2. Color/form: white to light-yellow pwdr. Strem# 15-0313. http://www.strem.com/catalog/v/15-0313/