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443999

Trimethyl borate

purified by redistillation, ≥99.5%

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
UNSPSC Code:
12352103
NACRES:
NA.22
PubChem Substance ID:
24868093
EC Number:
204-468-9
Beilstein/REAXYS Number:
1697939
MDL number:
MFCD00008346
Assay:
≥99.5%
Form:
liquid
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vapor density

3.59 (vs air)

Quality Segment

200

assay

≥99.5%

form

liquid

purified by

redistillation

refractive index

n20/D 1.346 (lit.)

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

Application

Trimethyl borate can be used as:
  • A reagent in the preparation of various trialkylamine−boranes from corresponding trialkylamines using lithium hydride/aluminum chloride catalyst.
  • A source of boron in the synthesis of boron nitride (BN) nanotubes by thermal-heating chemical vapor deposition (TH-CVD) method.
  • An electrolytic additive for electrochemical applications.
  • A reagent along with lithium di-tert-butyl(2,2,6,6-tetramethylpiperidino)zincate (TMP-zincate) for the synthesis of 1-tert-butyl-3,4-dihydroisoquinoline from isoquinoline via ortho metalation reaction.

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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

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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