CAS 7439-94-3 appears in our catalog under these names: Lutetium pieces, 99.9% (REO) , Lutetium foil, 0.1mm (0.004in) thick, 99.9% (REO) , Lutetium powder, -40 mesh, 99.9% (REO) , Lutetium pieces, distilled dendritic, 99.9% (REO) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1g, 5g, 25x25mm, 50x50mm.