Trimethyl borate
ALDRICH/452920 - ≥98%
Synonym: Boric acid trimethyl ester; Methyl borate
CAS Number: 121-43-7
Empirical Formula (Hill Notation): C3H9BO3
Molecular Weight: 103.91
EC Number: 204-468-9
MDL Number: MFCD00008346
Linear Formula: B(OCH3)3
Product Type: Chemical
| assay | ≥98% |
| bp | 68-69 °C (lit.) |
| density | 0.932 g/mL at 20 °C (lit.) |
| InChI | 1S/C3H9BO3/c1-5-4(6-2)7-3 |
| InChI key | WRECIMRULFAWHA-UHFFFAOYSA |
| mp | −34 °C (lit.) |
| Quality Level | 200  |
| refractive index | n |
| SMILES string | COB(OC)OC |
| vapor density | 3.59 (vs air) |
| Application: | Trimethyl borate reacts with a Grignard reagent or organolithium compounds to yield dimethyl boronates, which upon subsequent aqueous acid treatment afford corresponding boronic acids. The resultant boronic acids or esters are useful intermediates in various cross-coupling reactions such as Suzuki coupling and Chan-Lam coupling. It is also used in the preparation of sodium borohydride. |
| Legal Information: | ASCENSUS product |
| Packaging: | 100, 500 mL in Sure/Seal™ |
| Packaging: | 2 L in Sure/Seal™ |
| Symbol |    GHS02,GHS06,GHS08 |
| Signal word | Danger |
| Hazard statements | H225 - H301 + H311 + H331 - H319 - H360FD - H370 |
| Precautionary statements | P210 - P280 - P301 + P310 - P303 + P361 + P353 - P304 + P340 + P311 - P305 + P351 + P338 |
| Hazard Codes | T |
| Risk Statements | 60-61-11-21-36 |
| Safety Statements | 53-23-25-26-45 |
| RIDADR | UN 2416 3 / PGII |
| WGK Germany | WGK 1 |
| Flash Point(F) | 12.2 °F - (own results) |
| Flash Point(C) | -11 °C - (own results) |
| Purity | ≥98% |
| bp | 68-69 °C (lit.) |
| mp | −34 °C (lit.) |
| Density | 0.932 g/mL at 20 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352103 |