Ammonium metatungstate hydrate (AMT) is also more effective than ammonium metatungstate hydrate. Its molecular formula H28N6O41W12, molecular weight 2974.32, is a white crystalline powder or slightly yellow with a melting point of 100 ° C. Water solubility is one of the characteristics of meta tungsten; Ammonium metatungstate is often used to manufacture various petrochemical catalysts and other tungsten compounds, and is the main raw material for tungsten based catalysts in refineries.
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