Tungsten(VI) oxide, also known as tungsten trioxide or tungstic anhydride, WO3, is a chemical compound containing oxygen and the transition metal tungsten. It is obtained as an intermediate in the recovery of tungsten from its minerals
TO 135 (OTTO) Tungsten oxide nanopowder, APS 30 nm, 99.5% - used in industry to manufacture tungstates for x-ray screen phosphors, for fireproofing fabrics and in gas sensors.