CAS 2206-27-1 appears in our catalog under these names: Dimethyl sulfoxide-d_6, 99.9% (Isotopic) , Dimethyl sulfoxide-d_6, 99.5% (Isotopic) , Dimethyl sulfoxide-d_6, 100% (Isotopic) , Dimethyl sulfoxide-d_6, 100% (Isotopic), contains 0.03% v/v . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: *5x1g, *10x1g, 10g, 50g, 10each, 2each.