Magnesium chromate

Magnesium chromate
Names
	Other names Magnesium chromate(VI); Magnesium monochromate; Magnesium monochromate(VI)
Identifiers
CAS Number	13423-61-5;
3D model (JSmol)	Interactive image;
ChemSpider	55507;
ECHA InfoCard	100.033.204
PubChem CID	61599;
CompTox Dashboard (EPA)	DTXSID50893929 ;
	InChI InChI=1S/Cr.Mg.4O/q;+2;;;2-1 Key: CRGGPIWCSGOBDN-UHFFFAOYSA-N; InChI=1/Cr.Mg.4O/q;+2;;;2-1/rCrO4.Mg/c2-1(3,4)5;/q-2;+2 Key: CRGGPIWCSGOBDN-OVNOGNLDAB;
	SMILES [O-][Cr](=O)(=O)[O-].[Mg+2];
Properties
Chemical formula	MgCrO4
Molar mass	140.297 g·mol−1
Appearance	Yellow solid
Solubility in water	soluble
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H312, H315, H317, H318, H330, H335, H340, H350, H410
Precautionary statements	P203, P260, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P302+P352, P304+P340, P305+P354+P338, P316, P317, P318, P319, P320, P321, P330, P333+P317, P362+P364, P391, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Magnesium chromate is an inorganic compound with the chemical formula MgCrO₄. It is a yellow, odorless, water-soluble salt. It is available commercially in a variety of powders, from nanoscale to micron-sized, either as an anhydrous or hydrated form.^[2]^[3]

Uses

As a hydrate, it is useful as a corrosion inhibitor and pigment.^[4]

History

Before 1940, the literature about magnesium chromate and its hydrates was sparse, but studies starting in that year looked at its properties and solubility.^[5]

In 2011, an undecahydrate (containing 11 molecules of water) of this compound was discovered.^[6]

References

^ PubChem. "Magnesium chromate". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-02-11.
^ "Magnesium Chromate". American Elements. Archived from the original on 2013-07-22. Retrieved 2013-07-16.
^ Li, Su Ping; Jia, Xiao Lin; Qi, Ya Fang (2011). "Synthesis of Nano-Crystalline Magnesium Chromate Spinel by Citrate Sol-Gel Method". Advanced Materials Research. 284–286: 730. doi:10.4028/www.scientific.net/AMR.284-286.730. S2CID 137408833.
^ "Magnesium chromate hydrate, 99.8% (metals basis)". Us.vwr.com. Retrieved 2013-07-16.
^ Hill, Arthur E.; Soth, Glenn C.; Ricci, John E. (1940). "The Systems Magnesium Chromate—Water and Ammonium Chromate—Water from 0 to 75 °C". Journal of the American Chemical Society. 62 (8): 2131. Bibcode:1940JAChS..62.2131H. doi:10.1021/ja01865a059.
^ Fortes, A. Dominic; Wood, Ian G. (March 2012). "X-ray powder diffraction analysis of a new magnesium chromate hydrate, MgCrO₄·11H₂O". Powder Diffraction. 27 (1): 8–11. Bibcode:2012PDiff..27....8F. doi:10.1017/S088571561200005X. S2CID 101802113.

[1] PubChem. "Magnesium chromate". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-02-11.

[2] "Magnesium Chromate". American Elements. Archived from the original on 2013-07-22. Retrieved 2013-07-16.

[3] Li, Su Ping; Jia, Xiao Lin; Qi, Ya Fang (2011). "Synthesis of Nano-Crystalline Magnesium Chromate Spinel by Citrate Sol-Gel Method". Advanced Materials Research. 284–286: 730. doi:10.4028/www.scientific.net/AMR.284-286.730. S2CID 137408833.

[4] "Magnesium chromate hydrate, 99.8% (metals basis)". Us.vwr.com. Retrieved 2013-07-16.

[5] Hill, Arthur E.; Soth, Glenn C.; Ricci, John E. (1940). "The Systems Magnesium Chromate—Water and Ammonium Chromate—Water from 0 to 75 °C". Journal of the American Chemical Society. 62 (8): 2131. Bibcode:1940JAChS..62.2131H. doi:10.1021/ja01865a059.

[6] Fortes, A. Dominic; Wood, Ian G. (March 2012). "X-ray powder diffraction analysis of a new magnesium chromate hydrate, MgCrO₄·11H₂O". Powder Diffraction. 27 (1): 8–11. Bibcode:2012PDiff..27....8F. doi:10.1017/S088571561200005X. S2CID 101802113.

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