Zinc molybdate is an inorganic compound with the formula ZnMoO4. It is used as a white pigment, which that is also a corrosion inhibitor. A related pigment is sodium zinc molybdate, Na2Zn(MoO4)2.[4] The material has also been investigated as an electrode material.[5]
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ECHA InfoCard | 100.033.965 |
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Properties | |
ZnMoO4 | |
Molar mass | 225.33 g/mol |
Appearance | white tetragonal crystals |
Density | 4.32 g/cm3[2] |
Melting point | 900 °C (1,650 °F; 1,170 K) |
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tetragonal | |
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H315, H319, H335 | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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In terms of its structure, the Mo(VI) centers are tetrahedral and the Zn(II) centers are octahedral.[2]
The LD50 (oral, rats) is 11,500 mg/kg.[4] 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.
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