CAS 528521-89-3 appears in our catalog under these names: (S)-(+)-7,7'-Bis(di(3,5-dimethylphenyl)phosphino)-2,2',3,3'-tetrahydro-1,1'-spirobiindane, (S)-Xyl-SDP 98%, (S)-XYL-SDP, (S)-7,7'-Bis(bis(3,5-dimethylphenyl)phosphaneyl)-2,2',3,3'-tetrahydro-1,1'-spirobi[indene], 97%, 97%, (S)-7,7'-Bis(bis(3,5-dimethylphenyl)phosphaneyl)-2,2',3,3'-tetrahydro-1,1'-spirobi[indene], 97%. Offered by: Biosynth, Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 25mg, 50mg, 100mg, 250mg, 500mg, 1g, 5g.