Dipotassium hydrogenarsenate

Dipotassium hydrogenarsenate
	(K+)2[HAsO42− ]
Identifiers
CAS Number	21093-83-4;
3D model (JSmol)	Interactive image;
PubChem CID	13734063;
CompTox Dashboard (EPA)	DTXSID701337673;
	InChI InChI=1S/AsH3O4.2K/c2-1(3,4)5;;/h(H3,2,3,4,5);;/q;2*+1/p-2 Key: VDKPKGSKAWIEIN-UHFFFAOYSA-L;
	SMILES O[As](=O)([O-])[O-].[K+].[K+];
Properties
Chemical formula	AsHK2O4
Molar mass	218.122 g·mol−1
Appearance	white solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Dipotassium hydrogenarsenate is the inorganic compound with the formula K₂HAsO₄. A white solid, this salt can be prepared by neutralizing arsinic acid with potassium hydroxide. Two hydrates have been characterized by X-ray crystallography: K₂HAsO₄(H₂O)_2.5 and K₂HAsO₄(H₂O)₆.^[1]

Related compounds

Potassium dihydrogenarsenate, KH₂AsO₄

References

↑ Stöger, Berthold; Weil, Matthias; Zobetz, Erich (2012). "The 2.5- and 6-hydrates of dipotassium hydrogen arsenate, K₂HAsO₄: Complex hydrogen bonding networks, one with an "ambiguous" order-disorder structure". Zeitschrift für Kristallographie - Crystalline Materials. 227 (12): 859–868. Bibcode:2012ZK....227..859S. doi:10.1524/zkri.2012.1549.

[X-ray-1] Stöger, Berthold; Weil, Matthias; Zobetz, Erich (2012). "The 2.5- and 6-hydrates of dipotassium hydrogen arsenate, K₂HAsO₄: Complex hydrogen bonding networks, one with an "ambiguous" order-disorder structure". Zeitschrift für Kristallographie - Crystalline Materials. 227 (12): 859–868. Bibcode:2012ZK....227..859S. doi:10.1524/zkri.2012.1549.

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