323136

Trimethylboroxine

99%

• Synonym(s): 2,4,6-Trimethyl-1,3,5,2,4,6-trioxatriborinane, 2,4,6-Trimethylboroxine, Methaneboronic anhydride, Trimethyl-1,3,5,2,4,6-trioxatriborinane
• Linear Formula: (CH₃B)₃O₃
• CAS Number: 823-96-1
• Molecular Weight: 125.53
• UNSPSC Code: 12352103
• NACRES: NA.22
• PubChem Substance ID: 24859217
• MDL number: MFCD00013354
• Beilstein/REAXYS Number: 1757008

Properties

• Quality Segment: 100
• assay: 99%
• form: liquid
• refractive index: n20/D 1.362 (lit.)
• bp: 78-80 °C (lit.)
• mp: −38 °C (lit.)
• density: 0.898 g/mL at 25 °C (lit.)
• SMILES string: Cb1ob(C)ob(C)o1
• InChI: 1S/C3H9B3O3/c1-4-7-5(2)9-6(3)8-4/h1-3H3
• InChI key: GBBSAMQTQCPOBF-UHFFFAOYSA-N

Description

Application

Trimethylboroxine (TMB) is a cyclic anhydride of methyl-boronic acid. It can be been used:

• As a derivatizing agent for gas chromatographic/mass spectrometric analysis.
• In the preparation of methylaluminoxane (MAO) which is used in the polymerization of olefins.
• As an electrolyte additive to enhance the interface stability of electrode/electrolyte.
• In methylation of aryl halides by palladium-catalyzed Suzuki-Miyaura coupling reaction.
• In the preparation of CBS (Corey, Bakshi and Shibata) catalysts for asymmetric reductions of ketones to alcohols.

Safety Information

• Pictograms: GHS02,GHS05
• Signal Word: Danger
• Hazard Codes: H225,H314
• Precautionary Statements: P210 - P233 - P240 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Flam. Liq. 2 - Skin Corr. 1B
• Storage Class: 3 - Flammable liquids
• WGK: WGK 3
• Flash Point (°F): 15.8 °F - closed cup
• Flash Point (°C): -9 °C - closed cup
• PPE (personal protective equipment): Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter