Agent Name

Boron trifluoride etherate

Alternative Name

Boron trifluoride diethyl ether

CAS Number




Major Category



Borone trifluoride diethyl etherate; Bf3-ether complex; Borane, trifluoro-, cmpd with 1,1'-oxybis(ethane) (1:1); Boron fluoride - diethyl ether compound; Boron fluoride - ethyl ether complex; Boron fluoride - ethyl etherate; Boron fluoride diethyl ether complex; Boron fluoride diethyl etherate; Boron fluoride etherate; Boron fluoride ethyl ether; Boron fluoride monoetherate; Boron trifluoride - diethyl ether complex; Boron trifluoride - diethyl ether complex (1:1); Boron trifluoride - diethyl etherate; Boron trifluoride - ether complex; Boron trifluoride - ethyl ether; Boron trifluoride - ethyl ether (1:1); Boron trifluoride - ethyl ether complex; Boron trifluoride - ethyl etherate; Boron trifluoride etherate; Boron trifluoride ethyl etherate (1:1); Diethyl ether trifluoroborane complex; Ether, diethyl, borofluoride; Ethyl ether - boron trifluoride complex; Ethyl ether borofluoride; Ethyl ether, cmpd with boron fluoride (BF3) (1:1); Trifluorobon etherate; Trifluoroborane diethyl etherate; Trifluoroborane-1,1'-oxybis(ethane) (1:1); Trifluoroboron-diethyl ether complex; [ChemIDplus] UN2604


Metalloid Compounds (Boron)


Fuming, colorless liquid; [HSDB] Stable but highly flammable, pale yellow liquid; [ACGIH]


Used as a catalyst in chemical reactions (acetylation, alkylation, polymerization, dehydration, and condensation); [Merck Index #1349] Boron trifluoride ethers are effective reagents used as a source of boron trifluoride in the production of semiconductors and organic compounds; [ACGIH]


TLV Basis = respiratory tract irritation and pneumonitis; "Boron trifluoride is the key toxic exposure for workers handling or producing these materials." Reacts exothermically with water to release highly flammable ethers and corrosive boron trifluoride hydrates; [ACGIH] Corrosive to skin; [Quick CPC] Decomposes to form hydrogen fluoride in presence of moisture in air; [CAMEO]

Exposure Assessment

0.1 ppm, as BF3

Ceiling (ACGIH)

0.7 ppm

Vapor Pressure

4.2 mm Hg

Explanatory Notes

Flash point = 47.8 deg C; Explosive limits by volume in air: lower (5.1%); upper (36.0%); [ACGIH]

Adverse Effects
Toxic Pneumonitis



Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

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