Magnesium chromate

Magnesium chromate
Names
Other names
Magnesium chromate(VI)
Magnesium monochromate
Magnesium monochromate(VI)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.204 Edit this at Wikidata
  • 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
  • [O-][Cr](=O)(=O)[O-].[Mg+2]
Properties
MgCrO4
Molar mass 140.297 g·mol−1
Appearance Yellow solid
soluble
Hazards
GHS labelling:
GHS05: CorrosiveGHS06: ToxicGHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H301, H312, H315, H317, H318, H330, H335, H340, H350, H410
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).

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.

Uses

As a hydrate, it is useful as a corrosion inhibitor and pigment.

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.

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

References

  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.