Disodium methyl arsonate

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Disodium methyl arsonate
Disodium methyl arsenate.png
Disodium-methyl-arsenate-3D-balls.png
Names
IUPAC name
Disodium methyl-dioxido-oxoarsorane
Other names
Disodium methanearsonate; disodium methylarsonate
Identifiers
3D model (JSmol)
AbbreviationsDSMA
ChemSpider
ECHA InfoCard 100.005.110 OOjs UI icon edit-ltr-progressive.svg
PubChem CID
UNII
  • InChI=1S/CH5AsO3.2Na/c1-2(3,4)5;;/h1H3,(H2,3,4,5);;/q;2*+1/p-2 X mark.svgN
    Key: SDIXRDNYIMOKSG-UHFFFAOYSA-L X mark.svgN
  • InChI=1/CH5AsO3.2Na/c1-2(3,4)5;;/h1H3,(H2,3,4,5);;/q;2*+1/p-2
    Key: SDIXRDNYIMOKSG-NUQVWONBAA
  • C[As](=O)([O-])[O-].[Na+].[Na+]
Properties
CH3AsNa2O3
Molar mass 183.93 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Disodium methyl arsenate (DSMA) is the organoarsenic compound with the formula CH3AsO3Na2. It is a colorless, water-soluble solid derived from methanearsonic acid. It is used as a herbicide. [1] Tradenames include Metharsinat, Arrhenal, Disomear, Metharsan, Stenosine, Tonarsan, Tonarsin, Arsinyl, Arsynal, and Diarsen.

The EPA states that all forms of arsenic are a serious risk to human health and the United States' Agency for Toxic Substances and Disease Registry ranked arsenic as number 1 in its 2001 Priority List of Hazardous Substances at Superfund sites. [2] Arsenic is classified as a Group-A carcinogen. [2] The EPA states [3] that:

Arsenate (AsV) is the oxidized form and occurs in well-aerated soils, whereas in chemically-reduced soil environments, arsenite (AsIII) is the prevalent As form. Although arsenite is more toxic than arsenate, arsenate can also have deleterious effects on humans, plants, and microorganisms. Arsenic-contaminated soils pose serious risk to human health.

The EPA also states that, while contaminated soil poses a serious risk to health, arsenic frequently mobilizes from soils and other sources, ending up in water where it is even more of a toxicity issue. [2]

See also

References

  1. ↑ Grund, S. C.; Hanusch, K.; Wolf, H. U. "Arsenic and Arsenic Compounds". Ullmann's Encyclopedia of Industrial Chemistry . Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_113.pub2. ISBN   978-3-527-30673-2.
  2. 1 2 3 Dibyendu, Sarkar; Datta, Rupali (2007). "Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites". EPA. United States Environmental Protection Agency. Archived from the original on February 26, 2018. Retrieved 25 February 2018.
  3. ↑ Carelton, James (2007). "Final Report: Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites". EPA. United States Environmental Protection Agency. Archived from the original on February 26, 2018. Retrieved 25 February 2018.
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