Magnesium chromate

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Magnesium chromate
Properties
Molecular formula Mg2(CrO4)2
Molar mass 280.597
Except where noted otherwise, 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 Mg2(CrO4)2. 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.

History[edit]

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]

Uses[edit]

It is available commercially in a variety of powders, from nanoscale to micron-sized, either as an anhydrous or hydrate 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 undechydrate (containing 11 molecules of water) of this compound was discovered by scientists at the University College London.[6]

Hazards[edit]

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]

References[edit]

  1. ^ Hill, Arthur E.; Soth, Glenn C.; Ricci, John E. (1940). 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/www.scientific.net/AMR.284-286.730. 
  4. ^ "Magnesium chromate hydrate, 99.8% (metals basis)". Us.vwr.com. Retrieved 2013-07-16. 
  5. ^ "Item # MG-401, Heavy Magnesium Chromate Powder On Atlantic Equipment Engineers, A Division Of Micron Metals, Inc". Metal-powders-compounds.micronmetals.com. 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". Scbt.com. Retrieved 2013-07-16. 
  8. ^ "Material Data Sheet". McGean-Rohco, Inc. Retrieved 2013-07-16. 

External links[edit]