| Identification | More | [Name]
Sodium tetrafluoroborate | [CAS]
13755-29-8 | [Synonyms]
SODIUM BOROFLUORIDE
SODIUM FLUOBORATE
SODIUM FLUOROBORATE
SODIUM TETRAFLUOROBORATE
apretonr
Borate(1-),tetrafluoro-,sodium
boronsodiumfluoride(bnaf4)
sodiumborontetrafluoride
sodiumfluoborate(na(bf4))
sodiumfluoroborate(nabf4)
sodiumtetrafluoroborate(1-)
tetrafluoro-borate(1-sodium
boron sodium fluoride
tetrafluoro-borate sodium
Sodium fluoroberate
SODIUM TETRAFLUOROBORATE PURE, FREE FLOWING
SODIUM TETRAFLROROBORATE
Sodium tetrafluoroborate, extra pure, 98%
SODIUM TETRAFLUOROBORATE TECHNICAL
Sodiumtetrafluoroborate,98% | [EINECS(EC#)]
237-340-6 | [Molecular Formula]
BF4Na | [MDL Number]
MFCD00003515 | [Molecular Weight]
109.79 | [MOL File]
13755-29-8.mol |
| Chemical Properties | Back Directory | [Appearance]
white crystals or powder | [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 | [color ]
White to yellow to beige to brown | [Specific Gravity]
2.47 | [Stability:]
Moisture sensitive; do not store in glass (though the completely dry material does not etch glass). Incompatible with strong oxidizing agents. | [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 | [CAS DataBase Reference]
13755-29-8(CAS DataBase Reference) | [EPA Substance Registry System]
13755-29-8(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C,Xi | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S25:Avoid contact with eyes . | [RIDADR ]
3260 | [WGK Germany ]
1
| [RTECS ]
ED2975000
| [F ]
21 | [Hazard Note ]
Irritant | [TSCA ]
Yes | [HS Code ]
28269090 | [Safety Profile]
Moderately toxic by subcutaneous route. When heated to decomposition it emits toxic fumes of Fand Na2O. |
| Questions And Answer | Back Directory | [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.
|
| Hazard Information | Back Directory | [Chemical Properties]
white crystals or powder | [Uses]
Fluorinating agent, see Lawton, Levy, J. Am. Chem. Soc. 77, 6083 (1955). | [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 | [Synthesis]
Boric acid (6.2 g.) is added, with cooling, to 25 g. of 40% hydrofluoric acid contained in a Pt dish. The mixture is left standing for
six hours at room temperature, then cooled with ice, and 5.3 g of
dry Na2CO3 is added. The solution is then evaporated until crystallization starts. The salt can be recrystallized from water, whereby
large, beautiful single crystals can be obtained. The NaBF4 is
finally dried under vacuum.
2 H3BO3 + 8 HF + Na2CO3 = 2 NaBF4 + 7 H2O + CO2
| [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.] |
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