Chinese name sodium tungstate
English name Sodium tungstate
English alias Sodium tungsten oxide
Sodium tungsten oxide, Folin Reagent Grade
Tungstate, disodium, T-4)-
disodium dioxido (dioxo) tungsten
disodium tetraoxowolframate (2-)
CAS 13472-45-2
EINECS 236-743-4
Chemical formula Na2WO4
Molecular weight 293.817
Melting point 698°C
Physical and chemical properties Colorless crystal or white orthorhombic crystal.
Product use Used in the manufacture of metal tungsten, tungstic acid, tungstate, dyes, inks, catalysts, etc.
Upstream raw materials Caustic soda Hydrochloric acid
Downstream products Sunfast Pink Lake Sunfast Light Red Lake Sunfast Rose Lake Sunfast Blue Lotus Lake R Sunfast Blue Lotus Lake Sunfast Blue Original R Sunfast Blue Lake BO
Sodium tungstate – Properties
Colorless or white crystal. Relative density 3. 25. The melting point is 665°C. Insoluble in ethanol, slightly soluble in ammonia. Weathering in dry air. Soluble in 1.1 parts of water, slightly alkaline, pH8-9. It decomposes into water-insoluble tungstic acid when it encounters strong acid. Heating to 100°C loses crystal water
Anhydrous.
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