Ammonium arsenate
Names
Other names
Ammonium orthoarsenate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.152 Edit this at Wikidata
EC Number
  • 246-428-3
  • InChI=1S/AsH3O4.3H3N/c2-1(3,4)5;;;/h(H3,2,3,4,5);3*1H3 checkY
    Key: SNSGFXVMSAYXTC-UHFFFAOYSA-N checkY
  • InChI=1/AsH3O4.2H3N/c2-1(3,4)5;;/h(H3,2,3,4,5);2*1H3
    Key: XPVHUBFHKQQSDA-UHFFFAOYAT
  • [NH4+].[NH4+].[NH4+].[O-][As](=O)([O-])[O-]
Properties
(NH4)3AsO4 . 3 H2O
Molar mass 247.1 (trihydrate)
Soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ammonium arsenate is the inorganic compound with the formula (NH4)3AsO4. It is prepared by treating a concentrated solution of arsenic acid with ammonia, resulting in precipitation of colorless crystals of the trihydrate.[1] Upon heating, it releases ammonia.

Like other compounds of arsenic, it is classified as an IARC Group 1 carcinogen, i.e. carcinogenic to humans.[2]

Acid salts are also known, including diammonium arsenate and ammonium dihydrogen arsenate.

References

  1. ^ "Ammonium Orthoarsenate" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 602.
  2. ^ "Group 1: Carcinogenic to humans". IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. IARC. Archived from the original on 2010-07-01. Retrieved 2010-05-04.
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