Potassium Tungstate
Chinese Name:钨酸钾;钨酸钾二水合物;钨酸钾二水(>98%,BR);
CBNumber:CB2214856
Chemical Formula:K2O4W
Molecular Weight:326.03
CAS Number:7790-60-5
Property
Characteristics: White or colorless crystalline powder, monoclinic structure.
Density（g/mL 25oC）：3.12
Melting Point（oC）：921
Solubility(mg/mL) ：Soluble in water, insoluble in ethanol
Solubility in water(g/100ml)
Dissolving amount per 100ml water: 51.5g/20℃
Application
Can be used as analysis reagent, precipitation for alkaloid, and producing tungsten and bronze.
Synthesis Method
Mix K2Cr2O7 with tungsten powder, can heat to 1700 degree celsius within 0.1~0.2s, potassium tungstate and chromium sesquioxide. Reaction between W and KOH solution can obtain:
K2WO4：2W+3O2+4KOH2K2WO4+2H2OW+4KOHK2WO4+2K+2H2
W and KOH solution: no reaction without oxygen, K2WO4 can be obtained with oxygen.
Storage Method
Sealed in storage tools. Keep in dry and cool place.
Ecological Effect
Harmful to water, do not make contact with groundwater or sewage system or pour into environment without government's permission.
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