N 4859 (OTTO) Niobium pentoxide, pieces, dia 1-3 mm, 99.99% Cas 1313-96-8 - used in glass, optic and ceramic applications. The nanoparticles of niobium pentoxide are useful in the preparation of electrochemical capacitors and cathodes. In addition, appropriate preparations of this compound can be used as a dietary supplement in the food industry.