Trimethyl borate

Trimethyl borate

Identifiers
CAS Number	121-43-7
3D model (JSmol)	Interactive image
ECHA InfoCard	100.004.063
CompTox Dashboard (EPA)	DTXSID0037738
SMILES COB(OC)OC
Properties
Chemical formula	C3H9BO3
Molar mass	103.91 g·mol−1
Appearance	clear liquid
Density	0.915 g/ml
Melting point	−34
Solubility in water	decomposes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Trimethyl borate, or boron trimethoxide, has formula B(OCH₃)₃. It is a clear liquid. It melts at −34 °C and boils at 68-69 °C. It decomposes in contact with water. It is flammable and burns with a green flame.

It is primarily used as a precursor to boronic esters and boronic acids for Suzuki couplings. Other uses include :

1. Anti-oxidant in Brazing and Solder Flux
2. Wood preservative
3. Catalyst of olefin polymerisation
4. raw material in the production of borophosphosilicate glass film by chemical vapor deposition
5. raw material in the production of specialty glasses using sol-gel technology
6. solvent or catalyst for resins, waxes, paints, and varnishes
7. component of some flame retardants in textile industry
8. component of some welding fluxes
9. in green fire compositions for special effects (as a solution of boric acid in methanol, where it forms in small amounts)

External links

• National Pollutant Inventory - Boron and compounds
• Trimethyl Borate
• WebBook page for BC3H9O3
• Essay on Trimethyl borate (in Spanish)