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Sigma-Aldrich

Boron trifluoride-methanol complex

(20% solution in methanol) for synthesis

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Synonym(s):
BF3 methanol

vapor pressure

4 hPa ( 20 °C)

Quality Level

form

liquid

autoignition temp.

420 °C

expl. lim.

5.5 % (v/v) Methanol)

transition temp

flash point 16 °C

density

0.89 g/cm3 at 20 °C

storage temp.

2-30°C

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This Item
61626B1252434280
Boron trifluoride-methanol solution 14% in methanol

B1252

Boron trifluoride-methanol solution

form

liquid

form

-

form

liquid

form

liquid

autoignition temp.

420 °C

autoignition temp.

-

autoignition temp.

-

autoignition temp.

-

expl. lim.

5.5 % (v/v) Methanol)

expl. lim.

-

expl. lim.

-

expl. lim.

-

density

0.89 g/cm3 at 20 °C

density

0.859 g/mL at 25 °C

density

0.859 g/mL at 25 °C

density

1.268 g/mL at 25 °C (lit.)

vapor pressure

4 hPa ( 20 °C)

vapor pressure

-

vapor pressure

-

vapor pressure

-

General description

Boron trifluoride-methanol complex (BF-M) is Lewis acid boron trifluoride incoordination with methanol. BF-M is a powerful acidic catalyst for the esterification of fatty acids. In the deacetylation of acetanilides, the complex displayed excellent deprotection selectivity against amino-protecting groups.

Application

Boron trifluoride-methanol complex is used:
  • As a reagent for deprotection of N-acetyl derivatives (acetylated amines of cyanine-type dyes).
  • As a starting material in the automated radiosynthesis procedure for [18F]tetrafluoroborate.

Analysis Note

Assay BF3 (acidimetric): 14.0 - 16.0 %
Density (d 20 °C/ 4 °C): 0.880 - 0.895

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1B - STOT SE 1

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

60.8 °F

Flash Point(C)

16 °C


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Comparison of transesterification methods for production of biodiesel from vegetable oils and fats
Demirbas A
Energy Conversion and Management , 49(1), 125-130 (2008)
Boron trifluoride--methanol complex. Mild and powerful reagent for deprotection of acetylated amines. Scope and selectivity
Miltsov S, et al.
Tetrahedron Letters, 57(6), 641-644 (2016)
High molar activity [18F] tetrafluoroborate synthesis for sodium iodide symporter imaging by PET
Soloviev D, et al.
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Boron trifluoride--methanol complex-mild and powerful reagent for deprotection of labile acetylated amines
Miltsov S, et al.
Tetrahedron Letters, 44(11), 2301-2303 (2003)

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