T 0845 (OTTO) Titanium powder, -325 mesh, 99% Cas 7440-32-6 - used in steel as an alloying element (ferro-titanium) to reduce grain size and as a deoxidizer, and in stainless steel to reduce carbon content. T 0845 (OTTO) Titanium powder, -325 mesh, 99% Cas 7440-32-6 used as a catalyst in the production of polypropylene.