we can supply you the tantalum oxide as your requirement . and there are min 99.6% common tantalum oxide 2T in the store GradeTa2O5Main content, % By substraction(exclusive of F, Ignition Loss)99.5Impurity content(ppm max.)Nb0.02Ti0.002W0.003Mo0.002Cr0.003Mn0.002Fe0.01Ni0.005Cu0.005 Al 0.004Si 0.01F0.15 Ignition Loss, %, max0.5ApplicationFor tantalum rod, tantalum carbide, etc Packed in paper ...