Ammonium selenate

Ammonium selenate

Names
IUPAC name diazanium;selenate
Other names Diammonium selenate
Identifiers
CAS Number	7783-21-3  N
3D model (JSmol)	Interactive image
ChemSpider	145166
ECHA InfoCard	100.029.077
EC Number	231-985-7
PubChem CID	165640
UNII	02E09D6S55
CompTox Dashboard (EPA)	DTXSID40889578
InChI InChI=1S/H8N2O4Se/c1-5-7(3,4)6-2/h1-2H4 Key: HSQMXXJIBPJBCG-UHFFFAOYSA-N
SMILES [NH4+].[NH4+].[O-][Se](=O)(=O)[O-]
Properties
Chemical formula	H8N2O4Se
Molar mass	179.045 g·mol−1
Appearance	white crystals
Density	2.194 g/cm3
Solubility in water	soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium selenate is a chemical compound with the chemical formula (NH₄)₂SeO₄. ^{[1] [2]}

Synthesis

Synthesis is via a reaction of selenic acid with an excess of ammonium hydroxide. ^[3]

It may also be formed by the effect of an ammonia solution on a solution of selenic acid:

2NH₃ + H₂SeO₄ → (NH₄)₂SeO₄

Physical properties

Ammonium selenate forms white crystals of monoclinic system, spatial group C2/m, cell parameters a = 12.152, b = 6.418, c = 7.711, β = 115.5° Z = 4 and density 2.190 Mgm⁻³. ^[4]

It is easily soluble in water. ^[5] Soluble in EtOH and acetone. ^[6]

References

1. "Ammonium selenate". NIST . Retrieved 4 February 2025.
2. Specific Gravities, Boiling Points, and Melting Points: First Supplement to Part I. Smithsonian Institution. 1876. p. 18. Retrieved 4 February 2025.
3. Satya, Prakash (2013). Advanced Chemistry of Rare Elements. S. Chand Publishing. p. 300. ISBN   978-81-219-4254-6 . Retrieved 4 February 2025.
4. Carter, R. L.; Koerntgen, C.; Margulis, T. N. (15 February 1977). "Ammonium selenate" . Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry . 33 (2): 592–593. doi:10.1107/S0567740877004208. ISSN   0567-7408 . Retrieved 4 February 2025.
5. Comey, Arthur Messenger (1896). A Dictionary of Chemical Solubilities Inorganic: xx, 515 p. Macmillan & Company. p. 351. Retrieved 4 February 2025.
6. "MatWeb - The Online Materials Information Resource". matweb.com. Retrieved 4 February 2025.