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Sigma-Aldrich

Trimethyl borate

purum, ≥99.0% (GC)

Synonym(s):

Boric acid trimethyl ester, Methyl borate

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About This Item

Linear Formula:
B(OCH3)3
CAS Number:
121-43-7
Molecular Weight:
103.91
Beilstein/REAXYS Number:
1697939
EC Number:
204-468-9
MDL number:
MFCD00008346
UNSPSC Code:
12352103
PubChem Substance ID:
329769888
NACRES:
NA.22

vapor density

3.59 (vs air)

Quality Level

200

grade

purum

assay

≥99.0% (GC)

form

liquid

refractive index

n20/D 1.346 (lit.)
n20/D 1.358

bp

68-69 °C (lit.)

mp

−34 °C (lit.)

density

0.932 g/mL at 20 °C (lit.)

SMILES string

COB(OC)OC

InChI

1S/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3

InChI key

WRECIMRULFAWHA-UHFFFAOYSA-N

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Application

Trimethyl borate (TMB) can be used:
  • For the synthesis of luminogens having triphenylamine core and tetraphenylethene peripheral moieties.
  • For the synthesis of ammonia borane and trialkylamine boranes.
  • In the reduction of carboxylic acids in the presence of borane-methyl sulfide.
  • As a reagent to crosslink phopshate complexes.
  • As a source of boron to synthesize boron nitride nanotubes by chemical vapor deposition (CVD) method.

signalword

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Irrit. 2 - Flam. Liq. 2 - Repr. 1B - STOT SE 1

target_organs

Eyes

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

12.2 °F - (own results)

flash_point_c

-11 °C - (own results)

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
BCCC9592
BCBR6280V
BCBS8845V
BCBX6521
BCBW9316

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Organic synthesis using borane-methyl sulfide. II. Reduction of aromatic carboxylic acids in the presence of trimethyl borate.
Lane CF, et al.
The Journal of Organic Chemistry, 39(20), 3052-3054 (1974)
One-Pot Synthesis of Ammonia-Borane and Trialkylamine-Boranes from Trimethyl Borate.
Veeraraghavan RP, et al.
Organic Letters, 14(24), 6119-6121 (2012)
Thermal-heating CVD synthesis of BN nanotubes from trimethyl borate and nitrogen gas.
Lin FH, et al.
Materials Chemistry and Physics, 107(1), 115-121 (2008)
A Colorado et al.
Journal of mass spectrometry : JMS, 31(4), 403-410 (1996-04-01)
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