Zinc molybdate
Chemical compound
From Wikipedia, the free encyclopedia
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.[4] The material has also been investigated as an electrode material.[5]
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| Identifiers | |
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3D model (JSmol) |
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| ECHA InfoCard | 100.033.965 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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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) |
| insoluble | |
| Structure | |
| tetragonal | |
| Hazards | |
| GHS labelling:[3] | |
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| Warning | |
| H315, H319, H335, H411 | |
| P261, P264, P264+P265, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P391, P403+P233, P405, P501 | |
| NFPA 704 (fire diamond) | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
11,500 mg/kg (oral, rat)[4] |
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]
Safety
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.
