Potassium hexafluoroarsenate
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| Names | |
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| IUPAC name
potassium hexafluoro-λ⁵-arsanuide
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| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.037.351 |
| EC Number |
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| KEGG | |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| AsF6K | |
| Molar mass | 228.0103 g·mol−1 |
| Appearance | white powder |
| Melting point | 400 °C (752 °F; 673 K) |
| Hazards | |
| GHS labelling:[1] | |
 
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| Danger | |
| H301, H331, H410 | |
| P261, P264, P270, P271, P273, P301+P316, P304+P340, P316, P321, P330, P391, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium hexafluoroarsenate is an inorganic chemical compound with the chemical formula KAsF6.[2][3]
Synthesis
[edit]Potassium hexafluoroarsenate can be prepared by direct action of arsenic pentafluoride and potassium fluoride:
- AsF5 + KF → KAsF6
Also, it can be synthesized by the action of hydrofluoric acid on arsenic pentafluoride in the presence of potassium perbromate:[4]
- KBrO4 + 3HF + 2AsF5 + KF → KAsF6 + AsF6[H3O]
Also, potassium hexafluoroarsenate is synthesized by treating arsenic pentachloride and potassium chloride in the presence of hydrofluoric acid:
- AsCl5 + KCl + 6HF → KAsF6 + 6HCl
Physical characteristics
[edit]Potassium hexafluoroarsenate is a white powder with a pungent odor. The compound is stable under normal conditions. The melting point is around 400 °C. The substance is not flammable. It is incompatible with strong oxidizing agents.[5]
Safety
[edit]Potassium hexafluoroarsenate is toxic when swallowed or inhaled and is hazardous to the environment. The compound is considered carcinogenic. Hazards in the event of fire include hydrogen fluoride, potassium oxide and arsenic oxides.[6]
References
[edit]- ^ "Potassium hexafluoroarsenate". pubchem.ncbi.nlm.nih.gov.
- ^ "Potassium hexafluoroarsenate(V), 99% (metals basis), Thermo Scientific | Fisher Scientific". Fisher Scientific. Retrieved 15 June 2024.
- ^ "potassium hexafluoroarsenate". NIST. Retrieved 15 June 2024.
- ^ Hagen, A. P. (17 September 2009). Inorganic Reactions and Methods, The Formation of Bonds to Halogens (Part 1). John Wiley & Sons. p. 46. ISBN 978-0-470-14538-8. Retrieved 15 June 2024.
- ^ "GESTIS-Stoffdatenbank". gestis.dguv.de. Retrieved 15 June 2024.
- ^ "Potassium hexafluoroarsenate(V)". Sigma Aldrich. Retrieved 15 June 2024.