Molybdenum trioxide by MP Biomedicals is a high grade reagent. Also known as MoO3, this compound is an efficient catalyst. This reagent is available as a lime green powder which is soluble in ammonium hydroxide, ammonia bitartrate, potassium bitartrate, concentrated mineral acids, alkali hydroxides, and insoluble in water and NH4OH. It is naturally found as the rare mineral molybdite. This compound as a boiling point of 1155 C and a melting point of 795 C. This compound is industrially generated by roasting molybdenum disulfide.

• Molecular Formula: MoO₃
• Molecular Weight 143.94
• Soluble in ammonium hydroxide.

Molybdenum trioxide is widely used in chemical and biological sectors. Molybdenum Trioxide is used as a precursor to LAMOX fast ion conductors and superconductors. It is also added in the solid state synthesis of a remarkable ternary, reduced molybdenum oxide, Pr4Mo9O18, whose structure contains previously unknown Mo7, Mo13 and Mo19 clusters. The new cluster product is a small band gap semiconductor. It is also employed as a component of the co-catalyst used in the industrial production of acrylonitrile by the oxidation of propene and ammonia.