Magnesium chromate

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Magnesium chromate
3D model (Jmol) Interactive image
ChemSpider 55507
PubChem 61599
Molar mass 140.30 g·mol−1
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 a chemical compound, with the formula MgCrO4. It is a white or brownish, odorless, water-soluble solid with several important industrial uses. This chromate occurs naturally as a spinel, or can be manufactured as a powder.


Before 1940, the literature about Magnesium chromate and its hydrates was sparse, but studies starting in that year looked at its properties and solubility.[1]


It is available commercially in a variety of powders, from nanoscale to micron-sized, either as an anhydrous or hydrated form.[2][3]

As a hydrate, it is useful as a corrosion inhibitor and pigment,[4] or as an ingredient in cosmetics.[5] In 2011, an undecahydrate (containing 11 molecules of water) of this compound was discovered by scientists at the University College London.[6]


Magnesium chromate hydrate should be stored at room temperature, and there is no current therapeutic use.[7] It is a suspected carcinogen, and can cause acute and dermititis, and possibly kidney and liver damage if inhaled, so it should be treated as a hazardous waste.[8]


  1. ^ Hill, Arthur E.; Soth, Glenn C.; Ricci, John E. (1940). "The Systems Magnesium Chromate—Water and Ammonium Chromate—Water from 0 to 75°1". Journal of the American Chemical Society. 62 (8): 2131. doi:10.1021/ja01865a059. 
  2. ^ "Magnesium Chromate". American Elements. 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/ 
  4. ^ "Magnesium chromate hydrate, 99.8% (metals basis)". Retrieved 2013-07-16. 
  5. ^ "Item # MG-401, Heavy Magnesium Chromate Powder On Atlantic Equipment Engineers, A Division Of Micron Metals, Inc". Retrieved 2013-07-16. 
  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. doi:10.1017/S088571561200005X. 
  7. ^ "Magnesium chromate hydrate | CAS 23371-94-0 | Santa Cruz Biotech". Santa Cruz Biotechnology, Inc. Retrieved 2013-07-16. 
  8. ^ "Material Data Sheet" (PDF). McGean-Rohco, Inc. Retrieved 2013-07-16.