T 8915 (OTTO) Tungsten hexacarbonyl, 97% Cas 14040-11-0 - used as a precursor to a Fischer carbine complex, which used in the hiyama cross-coupling reactions.T 8915 (OTTO) Tungsten hexacarbonyl, 97% Cas 14040-11-0 - used in electron beam-induced deposition technique as well as a source of tungsten atoms. It is utilized to desulfurize organosulfur compounds.