Tantalum pentoxide, also known as tantalum(V) oxide, is the inorganic compound with the formula Ta2O5.
T 7211 (OTTO) Tantalum pentoxide sputtering target, diam. x thickness 101.6 mm × 4 mm, 99.9% Cas 1314-61-0 - used in the production of capacitors, due to its high dielectric constant.