Boron trifluoride

Boron trifluoride
Names
	IUPAC name Boron trifluoride
	Systematic IUPAC name Trifluoroborane
	Other names Boron fluoride, Trifluoroborane
Identifiers
CAS Number	7637-07-2 ; 13319-75-0 (dihydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:33093 ;
ChemSpider	6116 ;
ECHA InfoCard	100.028.699
EC Number	231-569-5;
PubChem CID	6356;
RTECS number	ED2275000;
UNII	7JGD48PX8P ;
UN number	compressed: 1008.; boron trifluoride dihydrate: 2851.
CompTox Dashboard (EPA)	DTXSID7041677 ;
	InChI InChI=1S/BF3/c2-1(3)4 Key: WTEOIRVLGSZEPR-UHFFFAOYSA-N ;
	SMILES FB(F)F;
Properties
Chemical formula	BF3
Molar mass	67.82 g/mol (anhydrous) ; 103.837 g/mol (dihydrate)
Appearance	colorless gas (anhydrous) ; colorless liquid (dihydrate)
Odor	Pungent
Density	0.00276 g/cm3 (anhydrous gas) ; 1.64 g/cm3 (dihydrate)
Melting point	−126.8 °C (−196.2 °F; 146.3 K)
Boiling point	−100.3 °C (−148.5 °F; 172.8 K)
Solubility in water	exothermic decomposition (anhydrous); very soluble (dihydrate)
Solubility	soluble in benzene, toluene, hexane, chloroform and methylene chloride
Vapor pressure	>50 atm (20 °C)
Dipole moment	0 D
Thermochemistry
Heat capacity (C)	50.46 J/(mol·K)
Std molar; entropy (S⦵298)	254.3 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−1137 kJ/mol
Gibbs free energy (ΔfG⦵)	−1120 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H280, H314, H330, H335, H373
Precautionary statements	P260, P280, P303+P361+P353, P304+P340, P305+P351+P338, P310, P403+P233
NFPA 704 (fire diamond)	3 0 1
Flash point	Nonflammable
	Lethal dose or concentration (LD, LC):
LC50 (median concentration)	1227 ppm (mouse, 2 hr); 39 ppm (guinea pig, 4 hr); 418 ppm (rat, 4 hr)
	NIOSH (US health exposure limits):
PEL (Permissible)	C 1 ppm (3 mg/m3)
REL (Recommended)	C 1 ppm (3 mg/m3)
IDLH (Immediate danger)	25 ppm
Safety data sheet (SDS)	ICSC 0231
Related compounds
Other anions	Boron trichloride; Boron tribromide; Boron triiodide;
Other cations	Aluminium fluoride; Gallium(III) fluoride; Indium(III) fluoride; Thallium(III) fluoride;
Related compounds	Boron monofluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Boron trifluoride is the inorganic compound with the formula BF₃. This pungent, colourless, and toxic gas forms white fumes in moist air. It is a useful Lewis acid and a versatile building block for other boron compounds.

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