The chemical formula of metatungstic acid is H6[H2W12O40]•XH2O. Metatungstic acid is a transparent octahedral crystal. The density (specific gravity) of metatungstic acid is 3.93g/cm3, and it will decompose when heated to 50°C. Metatungstic acid is soluble in water, ether and ethanol. solution at 50°C. The aqueous solution of metatungstic acid is strongly acidic, and the addition of acid does not produce precipitation.
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