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[2]
Melting point	900 °C (1,650 °F; 1,170 K)
Solubility in water	insoluble
Structure
Crystal structure	tetragonal
Hazards
	GHS labelling:[3]
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 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]

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

[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.