ChemicalBook > CAS DataBase List > Sodium tetrafluoroborate

Sodium tetrafluoroborate

Description Preparation Applications

CAS No.13755-29-8
Chemical Name:Sodium tetrafluoroborate
CBNumber:CB4775517
Molecular Formula:BF4Na
Formula Weight:109.79
MOL File:13755-29-8.mol

Sodium tetrafluoroborate Property

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
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)
FDA UNII CFC805A5WR
EPA Substance Registry System Borate(1-), tetrafluoro-, sodium (13755-29-8)
UNSPSC Code 12352302
NACRES NA.22

Safety

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

NFPA 704:

	0
3		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordDanger
Hazard statements H314
Precautionary statements P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363

Sodium tetrafluoroborate Price More Price(18)

Brand: Sigma-Aldrich(India)
Product number: 8.43877
Product name : Sodium tetrafluoroborate
Purity: for synthesis
Packaging: 250G
Price: ₹4129.99
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 8.43877
Product name : Sodium tetrafluoroborate
Purity: for synthesis
Packaging: 1KG
Price: ₹11030
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 202215
Product name : Sodium tetrafluoroborate
Purity: 98%
Packaging: 25G
Price: ₹3031
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 202215
Product name : Sodium tetrafluoroborate
Purity: 98%
Packaging: 500G
Price: ₹3128.43
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 71525
Product name : Sodium tetrafluoroborate
Purity: puriss. p.a., ≥98.0% (T)
Packaging: 50G
Price: ₹3961.95
Updated: 2022/06/14
Buy: Buy

Sodium tetrafluoroborate Chemical Properties,Usage,Production

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, crystallizes in the anhydrous form as clear, orthogonal, stubby prisms. Anhydrous NaBF4 does not etch glass. Readily soluble in water. Rhombic crystals, isodimorphous with NaClO4.
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 Not classified
Safety Profile Moderately toxic by subcutaneous route. When heated to decomposition it emits toxic fumes of Fand Na2O.
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.]