Ammonium hexafluoroaluminate
Names
Other names
Ammonium aluminium fluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.138 Edit this at Wikidata
EC Number
  • 264-415-0
UNII
  • InChI=1S/Al.6FH.3H3N/h;6*1H;3*1H3/q+3;;;;;;;;;/p-3 checkY
    Key: OYHBNKHFKHBTRQ-UHFFFAOYSA-K checkY
  • InChI=1/Al.6FH.3H3N/h;6*1H;3*1H3/q+3;;;;;;;;;/p-3/rAlF6.3H3N/c2-1(3,4,5,6)7;;;/h;3*1H3/q-3;;;/p+3
    Key: OYHBNKHFKHBTRQ-IQDJHOCXAA
  • [NH4+].[NH4+].[NH4+].F[Al-3](F)(F)(F)(F)F
Properties
(NH4)3[AlF6]
Molar mass 195.09 g/mol
Appearance White crystalline powder
Density 1.78 g/cm3 at 20 °C
Melting point 126.1 °C (259.0 °F; 399.2 K)
Boiling point 239.5 °C (463.1 °F; 512.6 K)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Irritant (Xi)
GHS labelling:
GHS06: Toxic
Danger
H301, H311, H330, H331
P260, P261, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P311, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
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 hexafluoroaluminate is an inorganic compound with the chemical formula of (NH4)3[AlF6]. It is a white solid. Upon heating, it converts to aluminium trifluoride, a reaction that releases hydrogen fluoride.[1] It has also been used as a precursor to zeolites.[2]

Preparation

Ammonium hexafluoroaluminate can be obtained by the reaction of ammonium fluoride and aluminium hydroxide.[3]

References

  1. ^ Alonso, C.; Morato, A.; Medina, F.; Guirado, F.; Cesteros, Y.; Salagre, P.; Sueiras, J. E.; Terrado, R.; Giralt, A. (2000). "Preparation and Characterization of Different Phases of Aluminum Trifluoride". Chemistry of Materials. 12 (4): 1148–1155. doi:10.1021/cm991195g.
  2. ^ Kao, Hsien-Ming; Ting, Chun-Chiang; Chao, Shih-Wei (2005). "Post-synthesis alumination of mesoporous silica SBA-15 with high framework aluminum content using ammonium hexafluoroaluminate". Journal of Molecular Catalysis A: Chemical. 235 (1–2): 200–208. doi:10.1016/j.molcata.2005.03.026.
  3. ^ hrsg. von Georg Brauer. Unter Mitarb. von M. Baudler (1975). Handbuch der präparativen anorganischen Chemie / 1 (in German). Stuttgart: Enke. p. 239. ISBN 3-432-02328-6. OCLC 310719485.
source: http://en.wikipedia.org/wiki/Ammonium_hexafluoroaluminate