CAS 7727-43-7 appears in our catalog under these names: Barium sulfate, Puratronic½, 99.998% (metals basis) , Barium sulfate, precipitated, 98% , Barium sulfate, 97% . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 25g, 100g, 10000g, 2500g, 500g, 1kg, 5kg.