Ammonium tetrafluoroborate

Structural formula
General
Surname	Ammonium tetrafluoroborate
other names	Ammonium tetrafluoroborate Ammonium fluoroborate Ammonium borofluoride
Molecular formula	NH 4 [BF 4 ]
Brief description	white odorless solid
External identifiers / databases
CAS number 13826-83-0 EC number 237-531-4 ECHA InfoCard 100.034.106 PubChem 9964072 Wikidata Q4456672
properties
Molar mass	104.84 g mol −1
Physical state	firmly
density	1.85 g cm −3 (20 ° C)
Melting point	220 ° C (sublimation)
solubility	soluble in water with slow decomposition
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 314 P: 280-301 + 330 + 331-305 + 351 + 338-308 + 310
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ammonium tetrafluoroborate is an inorganic chemical compound from the group of ammonium salts and fluoroborates . As a natural mineral formation , ammonium tetrafluoroborate is known under the name Barberiit .

Extraction and presentation

Ammonium tetrafluoroborate can be obtained by reacting boric acid with ammonium fluoride in sulfuric acid. The representation by reaction of ammonia with fluoroboric acid or ammonium bifluoride and boric acid is also possible.

${\displaystyle \mathrm {NH_{3}+HBF_{4}\longrightarrow NH_{4}[BF_{4}]} }$

properties

Ammonium tetrafluoroborate is a crystalline white odorless solid that is easily soluble in water. It slowly decomposes in water and its aqueous solution is acidic.

use

Ammonium tetrafluoroborate is used as the analytical reagent. It is also used in textile printing, the paint industry and as a catalyst. It is also used as a high-temperature flux in the metal industry, as a flame retardant and acts as a solid lubricant in cutting oil emulsions in aluminum rolling and forming.

Individual evidence

1. ↑ ^{a b c d e f g} Entry on ammonium tetrafluoroborate in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
2. ↑ ^{a b} Data sheet Ammonium tetrafluoroborate, 99.999% (metals basis) from AlfaAesar, accessed on July 9, 2016 ( PDF )(JavaScript required) .
3. ↑ MA Malati: Experimental Inorganic / Physical Chemistry An Investigative, Integrated Approach to Practical Project Work . Elsevier, 1999, ISBN 978-1-78242-050-7 , pp. 64 ( limited preview in Google Book search).
4. ^ Entry on ammonium tetrafluoroborate in the Hazardous Substances Data Bank , accessed on July 9, 2016.