CAS 870245-84-4 appears in our catalog under these names: Sodium 2'-(dicyclohexylphosphino)-2,6-diisopropylbiphenyl-4-sulfonate, 97%, XPhos-SO?Na 97%, Sodium 2'-(dicyclohexylphosphino)-2,6-diisopropyl-[1,1'-biphenyl]-4-sulfonate, 97%, 97%. Offered by: Fluorochem, Ambeed, Chemat. Available pack sizes: 100mg, 250mg, 1g, 5g.