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216607 Sigma-Aldrich

Boron trifluoride diethyl etherate

purified by redistillation, ≥46.5% BF3 basis

Synonym: Boron trifluoride ethyl etherate

  • CAS Number 109-63-7

  • Linear Formula BF3 · O(C2H5)2

  • Molecular Weight 141.93

  •  Beilstein/REAXYS Number 3909607

  •  EC Number 203-689-8

  •  MDL number MFCD00013194

  •  PubChem Substance ID 57647937

  •  NACRES NA.22



Related Categories 25mL Sure/Seal Reagents, Acids, Acids & Bases, Boron, Chemical Synthesis,
Quality Level   200
vapor density   4.9 (vs air)
vapor pressure   4.2 mmHg ( 20 °C)
assay   ≥46.5% BF3 basis
purified by   redistillation
expl. lim.   36 %
refractive index   n20/D 1.344 (lit.)
bp   126-129 °C (lit.)
mp   −58 °C (lit.)
density   1.15 g/mL (lit.)
storage temp.   2-8°C
SMILES string   CC[O+](CC)[B-](F)(F)F
InChI   1S/C4H10BF3O/c1-3-9(4-2)5(6,7)8/h3-4H2,1-2H3



Catalyst in the synthesis of polyol chains. Reagent for the coupling of imines to allylstannanes and 4′-nitrobenzenesulfenanilide to alkenes and alkynes.


4×25, 100, 800 mL in Sure/Seal™

The 25 mL Sure/Seal bottle is recommended as a single-use bottle. Repeated punctures will likely result in decreased performance of product.

Legal Information

Sure/Seal is a trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

Signal word 
Target organs 
Supplemental Hazard Statements 
UN 2604 3(8) / PGI
WGK Germany 
Flash Point(F) 
137.3 °F - closed cup
Flash Point(C) 
58.5 °C - closed cup


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Frequently Asked Questions

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If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
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What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
What is the "acidic gas" referred to in the statement "Water hydrolyzes material liberating acidic gas..." in the MSDS for Product 216607, Boron trifluoride diethyl etherate?
The gas in question is hydrogen fluoride, which istoxic.
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