Ammonium hexafluorophosphate

Structural formula
General
Surname	Ammonium hexafluorophosphate
other names	Ammonium phosphorus hexafluoride
Molecular formula	NH 4 [PF 6 ]
Brief description	colorless solid
External identifiers / databases
EC number	241-009-1
ECHA InfoCard	100.037.266
PubChem	9793912
Wikidata	Q2681631
properties
Molar mass	163.00 g mol −1
Physical state	firmly
density	2.18 g cm −3 (25 ° C)
Melting point	58 ° C (decomposition)
solubility	soluble in water (74.8 g l −1 at 20 ° C); soluble in acetic acid, methanol and ethanol;
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 314
	P: 280-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ammonium hexafluorophosphate is a chemical compound from the group of hexafluorophosphates .

Extraction and presentation

Ammonium hexafluorophosphate can be obtained by reacting phosphorus pentachloride with ammonium fluoride .

{\ displaystyle \ mathrm {PCl_ {5} +6 \ NH_ {4} F \ longrightarrow NH_ {4} [PF_ {6}] + 5 \ NH_ {4} Cl}}

It is also possible to display it by reacting phosphonitrile chloride with hydrofluoric acid .

{\ displaystyle \ mathrm {(NPCl_ {2}) _ {n} +6 \ n \ HF \ longrightarrow n \ NH_ {4} [PF_ {6}] + 2 \ n \ HCl}}

properties

Ammonium hexafluorophosphate is a colorless salt that is usually in the form of square, rarely rectangular leaves or thick sheets. It is very easily soluble in water and also soluble in acetone , methanol and ethanol . It decomposes when heated up without melting first and is slowly hydrolyzed by strong acids when boiled.

use

Ammonium hexafluorophosphate can be used to produce many salts of hexafluorophosphoric acid , for example sodium hexafluorophosphate monohydrate NaPF ₆ · H ₂ O or potassium hexafluorophosphate KPF ₆ and with RbCl or CsCl rubidium hexafluorophosphate or cesium hexafluorophosphate or cesium hexafluorophosphate are obtained with the appropriate alkali solutions .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g data sheet Ammonium hexafluorophosphate, 99.99% trace metals basis from Sigma-Aldrich , accessed on September 23, 2013 ( PDF ).
^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 25 ( limited preview in Google Book search).
↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 214.
↑ ^a ^b ^c ^d Willy Lange, Emil Müller: About the salts of phosphorus-hexafluoric acid, HPF ₆ . In: Reports of the German Chemical Society (A and B Series) . tape 63 , no. 5 . Wiley, May 7, 1930, ISSN 1099-0682 , pp. 1058-1070 , doi : 10.1002 / cber.19300630510 ( wiley.com ).

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f ^g data sheet Ammonium hexafluorophosphate, 99.99% trace metals basis from Sigma-Aldrich , accessed on September 23, 2013 ( PDF ).

[Dale_L._Perry-2] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 25 ( limited preview in Google Book search).

[brauer-3] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 214.

[Lange1930-4] Willy Lange, Emil Müller: About the salts of phosphorus-hexafluoric acid, HPF ₆ . In: Reports of the German Chemical Society (A and B Series) . tape 63 , no. 5 . Wiley, May 7, 1930, ISSN 1099-0682 , pp. 1058-1070 , doi : 10.1002 / cber.19300630510 ( wiley.com ).