CAS 7440-18-8 appears in our catalog under these names: Ruthenium powder, -22 mesh, Premion«, 99.98% (metals basis e, Ruthenium, 0.5% on granular carbon , Ruthenium, 5% on activated carbon powder, reduced, nominally, Ruthenium, 2% on 3.18mm (0.125in) alumina pellets , Ruthenium, 4% on 6.35mm (0.25in) alumina rings . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1g , 5g, 25g, 100g, 500g, 1g, 1pc, 2g.