Ammonium arsenate

Ammonium arsenate

Names
Other names Ammonium orthoarsenate
Identifiers
CAS Number	7784-44-3
ChemSpider	22978
Jmol interactive 3D	Image
InChI InChI=1S/AsH3O4.2H3N/c2-1(3,4)5;;/h(H3,2,3,4,5);2*1H3 Key: XPVHUBFHKQQSDA-UHFFFAOYSA-N InChI=1/AsH3O4.2H3N/c2-1(3,4)5;;/h(H3,2,3,4,5);2*1H3 Key: XPVHUBFHKQQSDA-UHFFFAOYAT
SMILES [O-][As]([O-])(=O)O.[NH4+].[NH4+]
Properties
Chemical formula	(NH4)3AsO4 . 3 H2O
Molar mass	247.1 (trihydrate)
Solubility in water	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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Infobox references

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]

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.