Zinc molybdate

Zinc molybdate^[1]
Identifiers
CAS Number	13767-32-3 ;
ECHA InfoCard	100.033.965
EC Number	237-377-8;
PubChem CID	16213780;
UNII	302KZX2NIS ;
CompTox Dashboard (EPA)	DTXSID10893960 ;
Properties
Chemical formula	ZnMoO4
Molar mass	225.33 g/mol
Appearance	white tetragonal crystals
Density	4.32 g/cm3
Melting point	900 °C (1,650 °F; 1,170 K)
Solubility in water	insoluble
Structure
Crystal structure	tetragonal
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
NFPA 704 (fire diamond)	2 0 0
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Zinc molybdate is an inorganic compound with the formula Zn MoO₄. 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]

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.^[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.

References

^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–95, ISBN 978-0-8493-0594-8
^ ^a ^b Ait Ahsaine, H.; Zbair, M.; Ezahri, M.; Benlhachemi, A.; Arab, M.; Bakiz, B.; Guinneton, F.; Gavarri, J. R. (2015). "Rietveld Refinements, Impedance Spectroscopy and Phase Transition of the Polycrystalline ZnMoO₄ Ceramics" (PDF). Ceramics International. 41 (10): 15193–15201. doi:10.1016/j.ceramint.2015.08.094. S2CID 93070036.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ "C&L Inventory". echa.europa.eu.
^ ^a ^b G. Etzrodt (2012). "Pigments, Inorganic 5. Anticorrosive Pigments". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.n20_n04. ISBN 978-3527306732.
^ Hu, Xianluo; Zhang, Wei; Liu, Xiaoxiao; Mei, Yueni; Huang, Yunhui (2015). "Nanostructured Mo-based electrode materials for electrochemical Energy Storage". Chemical Society Reviews. 44 (8): 2376–404. doi:10.1039/C4CS00350K. PMID 25688809. S2CID 205906132.

External links

Improved corrosion-inhibiting pigments

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[hand-1] Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–95, ISBN 978-0-8493-0594-8

[XRD-2] Ait Ahsaine, H.; Zbair, M.; Ezahri, M.; Benlhachemi, A.; Arab, M.; Bakiz, B.; Guinneton, F.; Gavarri, J. R. (2015). "Rietveld Refinements, Impedance Spectroscopy and Phase Transition of the Polycrystalline ZnMoO₄ Ceramics" (PDF). Ceramics International. 41 (10): 15193–15201. doi:10.1016/j.ceramint.2015.08.094. S2CID 93070036.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[3] "C&L Inventory". echa.europa.eu.

[Ull-4] G. Etzrodt (2012). "Pigments, Inorganic 5. Anticorrosive Pigments". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.n20_n04. ISBN 978-3527306732.

[5] Hu, Xianluo; Zhang, Wei; Liu, Xiaoxiao; Mei, Yueni; Huang, Yunhui (2015). "Nanostructured Mo-based electrode materials for electrochemical Energy Storage". Chemical Society Reviews. 44 (8): 2376–404. doi:10.1039/C4CS00350K. PMID 25688809. S2CID 205906132.

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