CAS 7440-58-6 appears in our catalog under these names: Hafnium foil, 0.75mm (0.03in) thick, 99.5% (metals basis exc, Hafnium wire, 0.25mm (0.01in) dia, 99.97% (metals basis excl, Hafnium powder, -325 mesh, 99.6% (metals basis excluding Zr), Hafnium wire, 1.0mm (0.04in) dia, 99.95% (metals basis exclu, Hafnium foil, 0.25mm (0.01in) thick, annealed, 99.5% (metals. Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 25x25mm, 50x50mm, 2m, 10m, 5g, 25g, 100g, 25cm.