氟化硼

Description

Boron fluoride · CAS 7637-07-2 · BF3. UNII 7JGD48PX8P. Boiling Point: -148 °F at 760 mmHg (NIOSH, 2024); Boiling Point: -99.9 °C; Boiling Point: -100 °C.

Identification

CAS Registry Number	7637-07-2
PubChem CID	6356
Molecular formula	BF3
IUPAC name	trifluoroborane
UNII (FDA)	7JGD48PX8P

Computed Descriptors

Molecular Weight	67.81
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	68.0045147
Monoisotopic Mass	68.0045147
Topological Polar Surface Area	0
Heavy Atom Count	4
Formal Charge	0
Complexity	8

Physical & Chemical Properties

Boiling Point	-148 °F at 760 mmHg (NIOSH, 2024)
Boiling Point	-99.9 °C
Boiling Point	-100 °C
Boiling Point	-148 °F
Boiling Point	-100 °C @760 [mm Hg]
Melting Point	-196.1 °F (EPA, 1998)
Melting Point	-126.8 °C
Melting Point	-127 °C
Melting Point	-196 °F
Solubility	106 % (in cold H2O) (NIOSH, 2024)

Physical description & handling notes

• Boron trifluoride is a colorless gas with a pungent odor. It is toxic by inhalation. It is soluble in water and slowly hydrolyzed by cold water to give off hydrofluoric acid, a corrosive material. Its vapors are heavier than air. Prolonged exposure of the containers to fire or heat may result in their violent rupturing and rocketing.
• Colorless gas with a pungent, suffocating odor; Note: Forms dense white fumes in moist air. Shipped as a nonliquefied compressed gas; [NIOSH] Vapor density = 2.34 (heavier than air); [Burke, p. 100]
• COLOURLESS COMPRESSED GAS WITH PUNGENT ODOUR. FORMS WHITE FUMES IN MOIST AIR.
• Colorless gas with a pungent, suffocating odor.
• Colorless gas with a pungent, suffocating odor. [Note: Forms dense white fumes in moist air. Shipped as a nonliquefied compressed gas.]
• Colorless gas

GHS Hazard Classification

Reported hazard statements	H314, H330, H280 (69.9%), H318 (30.9%), H335 (30.9%), H373 (31.4%), H371, H372

Documented Uses

• Used as a catalyst in organic synthesis, including olefin polymerization, petroleum cracking and desulfurization, and epoxy curing; Has been used in soldering flux, as a fumigant, for neutron measurement, and to protect molten magnesium; Also used in electronics industry (electrochemical high-temperature cells) and to produce microchips (metal etching agent); [ACGIH]
• Brazing [Category: Heat or Machine]
• Petroleum Production and Refining [Category: Industry]
• Soldering [Category: Heat or Machine]
• Semiconductor Manufacturing [Category: Industry]
• Metal Extraction and Refining [Category: Industry]

Synonyms

BORON TRIFLUORIDE; Trifluoroborane; Trifluoroboron; Borane, trifluoro-; 7637-07-2; Fluorure de bore; Boron fluoride (BF3); Anca 1040; 7JGD48PX8P; DTXSID7041677; CHEBI:33093; RefChem:5613; DTXCID5021677; 231-569-5; Boron fluoride; Boron trifluoride-methanol

Frequently Asked Questions

What are the CAS number and molecular formula of Boron fluoride?

CAS 7637-07-2; molecular formula BF3; molecular weight — g/mol.

What other names is Boron fluoride known by?

BORON TRIFLUORIDE, Trifluoroborane, Trifluoroboron, Borane, trifluoro-, 7637-07-2, Fluorure de bore.

Is Boron fluoride classified as hazardous?

Hazard statements reported: H314, H330, H280, H318, H335.

What are the key physical properties of Boron fluoride?

Boiling Point: -148 °F at 760 mmHg (NIOSH, 2024); Boiling Point: -99.9 °C; Boiling Point: -100 °C; Boiling Point: -148 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.