Potassium Tungstate

Introduction

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 25℃）：3.12
Melting Point（℃）：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.

Producing 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.