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CAS：13472-45-2
Molecular formula：Na2O4W
Molecular weight：293.81714
Structure：
Physicochemical properties: The anhydrous substance of sodium tungstate is a white opaque crystal block with δ，γ，β Three crystalline forms, from δ towards γ The transition temperature is about 570 ℃ γ towards β About 585 ℃, relative density 4.18 (18.5 ℃), melting point 700 ℃. In hydrogen, it will not change even when heated to 700 ℃, and it will become metallic tungsten at 1100 ℃.
Application: It is mainly used in the manufacture of metal tungsten, tungstic acid and tungstate, as well as dyes, pigments, inks, electroplating, etc. It is also used as fireproof agent and catalyst for fabrics and cellulose.
Manufacturing
