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Sodium tetrafluoroborate

Sodium tetrafluoroborate
The sodium cation
The tetrafluoroborate anion (ball-and-stick model)
Names
Other names
sodium fluoroborate, NaBF4
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.931
PubChem CID
Properties
NaBF4
Molar mass 109.794 g/mol
Density 2.47 g/cm3
Melting point 384 °C (723 °F; 657 K)
Related compounds
Other cations
Nitrosonium tetrafluoroborate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YesYN ?)
Infobox references

Sodium tetrafluoroborate is an inorganic compound with formula NaBF4. It is a salt that forms colorless or white water-soluble rhombic crystals and is soluble in water (108 g/100 mL) but less soluble in organic solvents.

Sodium tetrafluoroborate is used in some fluxes used for brazing and to produce Boron trifluoride.

Sodium tetrafluoroborate can be prepared by neutralizing tetrafluoroboric acid with sodium carbonate or sodium hydroxide.

Alternatively the chemical can be synthesized from boric acid, hydrofluoric acid, and sodium carbonate:

On heating to its melting point, sodium tetrafluoroborate decomposes to sodium fluoride and boron trifluoride:

It is a source of tetrafluoroborate anion, which is used in organic chemistry for the preparation of salts. Sodium tetrafluoroborate can be used for synthesis of ionic liquids, where tetrafluoroborate is the anion.


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