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| | Sodium tetrafluoroborate Chemical Properties |
| Melting point | 384 °C | | density | 2.47 g/mL at 25 °C(lit.) | | storage temp. | Inert atmosphere,Room Temperature | | solubility | water: soluble(lit.) | | form | Powder, Crystals or Needles | | Specific Gravity | 2.47 | | color | White to yellow to beige to brown | | Water Solubility | 108 g/100 mL (26 ºC) | | Sensitive | Hygroscopic | | Merck | 14,8617 | | Exposure limits | ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 | | Stability: | Moisture sensitive; do not store in glass (though the completely dry material does not etch glass). Incompatible with strong oxidizing agents. | | CAS DataBase Reference | 13755-29-8(CAS DataBase Reference) | | EPA Substance Registry System | Borate(1-), tetrafluoro-, sodium (13755-29-8) |
| Hazard Codes | C,Xi | | Risk Statements | 34 | | Safety Statements | 45-36/37/39-25-26 | | RIDADR | 3260 | | WGK Germany | 1 | | RTECS | ED2975000 | | F | 21 | | Hazard Note | Irritant | | TSCA | Yes | | HS Code | 2826 90 80 |
| | Sodium tetrafluoroborate Usage And Synthesis |
| Description | Sodium tetrafluoroborate is an organic compound that has the molecular formula NaBF4. The compound is a salt that forms white or colorless water-soluble rhombic crystals. It is less soluble in organic solvents and readily soluble in water.
| | Preparation | Sodium tetrafluoroborate can be prepared by reacting tetrafluoroboric with sodium carbonate or hydroxide.
NaOH + HBF4 → NaBF4 + H2O
Na2CO3 + 2 HBF4 → 2 NaBF4 + H2O + CO2
| | Applications | Sodium tetrafluoroborate can be used as a catalyst for the synthesis of bis(indolyl)methanes via electrophilic substitution reaction of indoles with ketones and aldehydes. In the synthesis of ionic liquids such as trihexyl(tetradecyl)phosphonium tetrafluoroborat and 1-butyl-3-methylimidazolium tetrafluoroborate.
In the laboratory, sodium tetrafluoroborate may be used for the synthesis of boron fluoride. It may also be used in the synthesis of fluoroheterocyclic and fluoro-nucleic acids. The compound is also used in metal finishing, fluxes, and plating circuits.
| | Chemical Properties | white crystals or powder | | Uses | Fluorinating agent, see Lawton, Levy, J. Am. Chem. Soc. 77, 6083 (1955). | | Uses | Sodium Tetrafluoroborate is used in various metal finishing and plating circuits. | | Uses | Sodium tetrafluoroborate may be used for the laboratory synthesis of boron fluoride. It may be used for the synthesis of fluoro-nucleic acids and fluoroheterocyclic compounds. | | General Description | Sodium tetrafluoroborate (NaBF4) is colorless sodium salt and its crystals belong to the rhombic crystal system. It can be synthesized by reacting tetrafluoroboric acid with sodium carbonate or hydroxide. | | Flammability and Explosibility | Notclassified | | Safety Profile | Moderately toxic by subcutaneous route. When heated to decomposition it emits toxic fumes of Fand Na2O. | | Purification Methods | Crystallise the fluoroborate from hot water (50mL/g) by cooling to 0o. Alternatively, free it from insoluble material by dissolving it in a minimum amount of water; then fluoride ions are removed by adding concentrated lanthanum nitrate in excess. After removing lanthanum fluoride by centrifugation, the supernatant is passed through a cation-exchange column (Dowex 50, Na+-form) to remove any remaining lanthanum [Anbar & Guttman J Phys Chem 64 1896 1960]. It has also been recrystallised from anhydrous MeOH and dried in a vacuum at 70o for 16hours. Keep it dry as it is hygrosopic. [Delville et al. J Am Chem Soc 109 7293 1987.] |
| | Sodium tetrafluoroborate Preparation Products And Raw materials |
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