Trimethyl borate, 99.9995+% (metals basis)

Catalog No.	Quantity
AA2297530	250 g
AA2297518	50 g

Catalog No. AA2297530 Supplier Thermo Scientific Chemicals Supplier No. 02297530

Description

CAS: 121-43-7 | C3H9BO3 | 103.912 g/mol

Trimethyl borate is a useful reagent in organic synthesis. It is involved in the production of resins, waxes and paints and acts as a methylation agent. As a boron source, it is used to prepare flame retardants, anti-oxidants and corrosion inhibitors. It reacts with Grignard reagents followed by hydrolysis to prepare boronic acid. It is also used as a precursor of borate esters, which finds application in the Suzuki coupling reaction. It is an intermediate in the preparation of sodium borohydride.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Specifications

Chemical Identifiers

• CAS: 121-43-7
• Molecular Formula: C3H9BO3
• Molecular Weight (g/mol): 103.912
• MDL Number: MFCD00008346
• InChI Key: WRECIMRULFAWHA-UHFFFAOYSA-N
• Synonym: trimethoxyborane, methyl borate, trimethoxyboron, boric acid, trimethyl ester, trimethylborate, boric acid trimethyl ester, trimethoxyborine, borester o, boric acid h3bo3 , trimethyl ester, b och3 3
• PubChem CID: 8470
• ChEBI: CHEBI:38913
• IUPAC Name: trimethyl borate
• SMILES: B(OC)(OC)OC

• Melting Point: -34°C
• Color: Colorless
• Density: 0.915 g/mL
• Boiling Point: 67°C to 69°C
• Flash Point: -8°C (17°F)
• Odor: Odorless
• Assay Percent Range: >99.9995% (metals basis)
• Refractive Index: 1.361
• Linear Formula: (CH₃O)₃B
• Quantity: 250 g
• UN Number: UN2416
• Beilstein: 1697939
• Sensitivity: Moisture sensitive
• Merck Index: 14,9712
• Solubility Information: Miscible with tetrahydrofuran,ether,isoporpylamine,hexane and methanol.
• Formula Weight: 103.92
• Percent Purity: ≥99.9995%
• Physical Form: Liquid
• Assay: (metals basis)
• Chemical Name or Material: Trimethyl borate

Safety and Handling

Hazard Category	H225-H312-H370
Hazard Statement	GHS H Statement H225-H312 Highly flammable liquid and vapor. Harmful in contact with skin.
Precautionary Statement	P210-P233-P240-P243-P260-P264b-P270-P280-P302+P352-P312-P314-P362-P372-P374-P380-P501c
DOTInformation	Transport Hazard Class: 3; Packing Group: II; Proper Shipping Name: TRIMETHYL BORATE
EINECSNumber	204-468-9
RTECSNumber	ED5600000
TSCA	Yes
Recommended Storage	Ambient temperatures; Store under Nitrogen

SDS

RUO – Research Use Only