Trifluoroborane

BF3

trifluoroborane

CAS7637-07-2
GHS04 Gefahrensymbol: Unter Druck stehende Gase – Gasflasche
GHS06 Gefahrensymbol: Giftig – Totenkopf mit Knochen
GHS05 Gefahrensymbol: Ätzend – Ätzwirkung
Danger

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Identification

CAS Number
7637-07-2
EC Number
231-569-5
UN Number
1008
Index Number
005-001-00-X
PubChem CID
6356

Physical-chemical properties

Molecular Formula
BF3
Molar Mass
67.81 g/mol
IUPAC Name
trifluoroborane

Chemical Identifiers

InChI
InChI=1S/BF3/c2-1(3)4
InChI Key
WTEOIRVLGSZEPR-UHFFFAOYSA-N

Overview

Trifluoroborane (CAS 7637-07-2) is a highly reactive boron trihalide gas with strong Lewis acid properties and significant industrial applications. This colorless, toxic gas with the molecular formula BF3 represents one of the most important boron compounds in industrial chemistry. With a molecular weight of 67.81 g/mol, trifluoroborane exhibits exceptional reactivity due to boron's electron-deficient nature, making it an extremely powerful Lewis acid. The compound readily forms coordination complexes with electron-donating species and demonstrates high affinity for moisture, reacting vigorously with water to produce hydrogen fluoride and boric acid. The safety profile of trifluoroborane demands careful handling protocols. Classified as acutely toxic (Category 2) and highly corrosive to skin (Category 1A), this pressurized gas requires specialized containment systems and protective equipment. The presence of GHS pictograms for compressed gas, acute toxicity, and corrosion underscores the critical importance of proper storage and handling procedures. Unlike related boron trihalides such as trichloroborane, trifluoroborane's fluorine content creates additional hazards due to potential hydrogen fluoride formation upon hydrolysis. Industrial applications leverage trifluoroborane's unique catalytic properties, particularly in polymerization processes where it serves as an essential catalyst for cationic polymerization of olefins and vinyl compounds. The semiconductor industry utilizes this compound in plasma etching and chemical vapor deposition processes, while the pharmaceutical sector employs it as a reagent in specialized synthetic pathways. OYSI maintains reliable supply chains for trifluoroborane, ensuring consistent availability of this critical industrial chemical for European manufacturers requiring high-purity boron compounds.

Safety & Classification

Danger
Classification:

Press. Gas; Acute Tox. 2 *; Skin Corr. 1A

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H330

Fatal if inhaled.

H314

Causes severe skin burns and eye damage.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Fatal

Measures if vapours or dust are inhaled

First Aid Actions

  • +P304IF INHALED:
  • +P340Remove person to fresh air and keep comfortable for breathing.
  • +P311Call a POISON CENTER/doctor.

Related hazard statements:

Skin Contact

Harmful

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Eye Contact

Harmful

Measures if substance gets into the eyes

First Aid Actions

  • +P305IF IN EYES:
  • +P351Rinse cautiously with water for several minutes.
  • +P338Remove contact lenses, if present and easy to do. Continue rinsing.
  • +P313Get medical advice/attention.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1008
ADR Class2
Packing Group
Tunnel CodeC/D
Proper Shipping NameBortrifluorid, unter Druck verflüssigt
Marine PollutantNo

Frequently Asked Questions

What is trifluoroborane?

Trifluoroborane is an inorganic chemical compound with the formula BF3 and CAS number 7637-07-2. This boron trihalide has a molecular weight of 67.81 g/mol and exists as a pressurized gas under normal conditions. It is classified as a highly toxic and corrosive substance, requiring careful handling due to its dangerous properties including acute toxicity and severe skin corrosion potential.

What are the physicochemical properties of trifluoroborane?

Trifluoroborane is a colorless gas at room temperature with a pungent, suffocating odor. It exists as a pressurized gas under standard conditions and readily hydrolyzes in moist air, forming white fumes of boric acid and hydrogen fluoride. The compound is highly reactive with water and alcohols, making it moisture-sensitive and requiring anhydrous conditions for storage and handling.

What is trifluoroborane used for?

Trifluoroborane serves as a powerful Lewis acid catalyst in organic synthesis reactions, particularly in polymerization processes and Friedel-Crafts reactions. It is used in the semiconductor industry for ion implantation and plasma etching processes. Additionally, it finds applications in the production of boron-containing compounds and as a catalyst in various chemical manufacturing processes requiring strong acidic conditions.

How to handle trifluoroborane safely?

Trifluoroborane requires strict safety protocols including the use of full-face respirators, chemical-resistant gloves, and complete body protection due to its acute toxicity and corrosive nature. Work must be conducted in well-ventilated areas or under fume hoods, avoiding any contact with skin, eyes, or inhalation. Emergency shower and eyewash stations should be readily accessible when handling this dangerous substance.

How to store trifluoroborane correctly?

Trifluoroborane must be stored in appropriate pressure vessels in cool, dry, well-ventilated areas away from moisture and incompatible materials. Storage areas should be equipped with gas detection systems and maintained below 25°C. The compound is incompatible with water, alcohols, and basic substances, requiring separate storage from these materials to prevent dangerous reactions.

What to do in case of contact with trifluoroborane?

Immediate evacuation from the exposure area is essential, followed by fresh air provision for inhalation exposure. Skin contact requires immediate removal of contaminated clothing and thorough washing with water for at least 15 minutes. Eye contact demands immediate irrigation with water for 15 minutes minimum. Seek immediate medical attention in all exposure cases due to the compound's high toxicity and corrosive properties.

How to dispose of trifluoroborane appropriately?

Trifluoroborane disposal requires professional hazardous waste management services due to its classification as dangerous waste. The compound cannot be disposed of through regular waste streams and must be neutralized by trained professionals using appropriate chemical treatment methods. All disposal activities must comply with local environmental regulations and require proper documentation for hazardous waste tracking.

How to transport trifluoroborane?

Trifluoroborane is classified under ADR Class 2 (Gases) for transportation purposes, requiring specialized dangerous goods packaging and labeling. Transport must comply with international dangerous goods regulations, including proper cylinder specifications, hazard labeling, and documentation. Only certified dangerous goods transporters should handle shipments, ensuring compliance with all safety and regulatory requirements throughout the supply chain.

Is trifluoroborane subject to specific regulations?

Trifluoroborane is regulated under multiple frameworks including CLP regulation for classification and labeling, and REACH regulation for chemical safety. It is not currently listed as an SVHC (Substance of Very High Concern). Users must comply with occupational exposure limits, proper hazard communication requirements, and maintain safety data sheets for workplace safety and regulatory compliance.

Where to buy trifluoroborane in Europe?

Trifluoroborane is available through OYSI, a European distributor specializing in technical chemicals and dangerous goods. As an established chemical distributor, OYSI can provide proper documentation, safety data sheets, and ensure compliant packaging and transportation throughout Europe. Contact OYSI directly for availability, technical specifications, and regulatory compliance support for your trifluoroborane requirements.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.