Zinc molybdate
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| Template:Longitem | ZnMoO4 |
| Molar mass | 225.33 g/mol |
| Appearance | white tetragonal crystals |
| Density | 4.32 g/cm3[2] |
| Melting point | Template:Chembox CalcTemperatures |
| Template:Longitem | tetragonal |
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Zinc molybdate is an inorganic compound with the formula ZnMoO4. It is used as a white pigment, which is also a corrosion inhibitor. A related pigment is sodium zinc molybdate, Na2Zn(MoO4)2.[3] The material has also been investigated as an electrode material.[4]
In terms of its structure, the Mo(VI) centers are tetrahedral and the Zn(II) centers are octahedral.[2]
Safety
The LD50 (oral, rats) is 11,500 mg/kg.[3] While highly soluble molybdates like e.g. sodium molybdate are toxic in higher doses, zinc molybdate is essentially non-toxic because of its insolubility in water. Molybdates possess a lower toxicity than chromates or lead salts and are therefore seen as an alternative to these salts for corrosion inhibition.
References
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