Vanadium is also present in bauxite and in deposits of crude oil, coal, oil shale and tar sands. In crude oil, concentrations up to 1200 ppm have been reported. When such oil products are burned, traces of vanadium may cause corrosion in engines and boilers.
VR002 (OTTO) Vanadium rod, dia ~ 6.35 mm, 99.5% Cas no 7440-62-2 - used as a catalyst in manufacturing sulfuric acid by the contact process and as an oxidizer in maleic anhydride production.