Potassium Molybdate
Potassium molybdate) is kind of colorless powder and has deliquescence. Its physical and chemical properties are as following:
| Appearance | colorless powder |
| Density(g/mL,25/4℃) | 2.91 |
| Melting Point(℃) | 919 |
| Boiling Point(℃, ordinary pressure) | 1400 |
| Solubility | soluble |
| Chemical Property | Stable in room temperature, normal pressure and should avoid contacting with oxides, moisture and interhalogen. Easy soluble in hot water, insoluble in ethyl alcohol. |
Molybdenum can react with molten KNO2 to obtain potassium molybdate. KNO2 can melt molybdenum fully. The reaction will begin at 660 ℃(or 600 ℃) oxygen-free environment and the reaction has oxygen will start earlier. If the reaction hasn’t oxidant, Mo in KOH solution will more stable and oxidizing agent such as O2, H2O2, CuSO4 (NH4OH), Br2, and I2 can facilitate the reaction, so molybdenum in 0.5mol / L KOH can partially dissolve within 64h.
Potassium molybdate has some toxicity, mainly irritant effect. It is usually slightly harmful to water, so do not let undiluted product to reach ground water, water course or sewage system and without government permission do not allow material discharged into the surrounding environment. In addition, it should be sealed at room temperature and stored in a cool dry place.
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