Boron trifluoride

Boron trifluoride
Boron trifluoride in 2D
Boron trifluoride in 2D
Boron trifluoride in 3D
Boron trifluoride in 3D
Names
IUPAC name
Boron trifluoride
Systematic IUPAC name
Trifluoroborane
Other names
Boron fluoride, Trifluoroborane
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.028.699 Edit this at Wikidata
EC Number
  • 231-569-5
RTECS number
  • ED2275000
UNII
UN number compressed: 1008.
boron trifluoride dihydrate: 2851.
  • InChI=1S/BF3/c2-1(3)4 checkY
    Key: WTEOIRVLGSZEPR-UHFFFAOYSA-N checkY
  • FB(F)F
  • [F+]=[B-](F)F
Properties
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)
exothermic decomposition [1] (anhydrous)
very soluble (dihydrate)
Solubility soluble in benzene, toluene, hexane, chloroform and methylene chloride
Vapor pressure >50 atm (20 °C)[2]
0 D
Thermochemistry
50.46 J/(mol·K)
254.3 J/(mol·K)
−1137 kJ/mol
−1120 kJ/mol
Hazards[4][5]
GHS labelling:
Acute Tox. 2 Skin Corr. 1A GHS08: Health hazard
Danger
H314, H330, H335, H373
P260, P280, P303+P361+P353, P304+P340, P305+P351+P338, P310, P403+P233
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
3
0
1
Flash point Nonflammable
Lethal dose or concentration (LD, LC):
1227 ppm (mouse, 2 hr)
39 ppm (guinea pig, 4 hr)
418 ppm (rat, 4 hr)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
 C 1 ppm (3 mg/m3)[2]
REL (Recommended)
 C 1 ppm (3 mg/m3)[2]
IDLH (Immediate danger)
 25 ppm[2]
Safety data sheet (SDS) ICSC 0231
Related compounds
Other anions
Other cations
Related compounds
 Boron monofluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

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.

  1. ^ Prudent Practices in the Laboratory. 16 August 1995. doi:10.17226/4911. ISBN 978-0-309-05229-0. Archived from the original on 14 December 2014. Retrieved 7 May 2018. {{cite book}}: |website= ignored (help)
  2. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0062". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ "Boron trifluoride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ Index no. 005-001-00-X of Annex VI, Part 3, to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006. OJEU L353, 31.12.2008, pp 1–1355 at p 341.
  5. ^ "Boron trifluoride", Pocket Guide to Chemical Hazards, U.S. Department of Health and Human Services (NIOSH) Publication No. 2005-149, Washington, DC: Government Printing Office, 2005, ISBN 9780160727511.
  6. ^ Inc, New Environment. "New Environment Inc. - NFPA Chemicals". www.newenv.com. Archived from the original on 27 August 2016. Retrieved 7 May 2018. {{cite web}}: |last= has generic name (help)