How is ammonium molybdate produced from purified molybdenum trioxide?

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To produce ammonium molybdate from purified molybdenum trioxide, the chemically pure molybdenum trioxide (MoO₃)—which must reach a purity level of 99.95 percent—is reacted with aqueous ammonia.1

This process yields ammonium molybdate in the form of white crystals, which typically assay between 81 and 83 percent MoO₃. These crystals are soluble in water and serve as a vital starting material for the preparation of various molybdenum chemicals, catalysts, and metallic molybdenum powder.12