can't read?
Molybdenum trioxide is chemical compound with the formula MoO3. This compound is produced on the largest scale of any molybdenum compound. It occurs as the rare mineral molybdite. Its chief application is as an oxidation catalyst and as a raw material for the production of molybdenum metal.
M 2325 (OTTO) Molybdenum trioxide, 99% Cas 1313-27-5 - used to manufacture molybdenum metal, which serves as an additive to steel and corrosion-resistant alloys.