CAS 811-98-3 appears in our catalog under these names: Methanol-d{4}, 99.8%(Isotopic) , Methanol-d{4}, 99.8% (Isotopic) , Methanol-d_4, 99.8% (Isotopic), contains 0.05% v/v TMS , Methanol-d_4, 100%(Isotopic) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1g, 5g, 25g, 10each, 2each.