Tetramethyl orthosilicate
ALDRICH/218472 - 98%
Synonym: Tetramethoxysilane
CAS Number: 681-84-5
Empirical Formula (Hill Notation): C4H12O4Si
Molecular Weight: 152.22
EC Number: 211-656-4
MDL Number: MFCD00008341
Linear Formula: Si(OCH3)4
Product Type: Chemical
| assay | 98% |
| bp | 121-122 °C (lit.) |
| density | 1.023 g/mL at 25 °C (lit.) |
| form | liquid |
| InChI | 1S/C4H12O4Si/c1-5-9(6-2,7 |
| InChI key | LFQCEHFDDXELDD-UHFFFAOYSA |
| mp | −4 °C (lit.) |
| Quality Level | 200  |
| refractive index | n |
| SMILES string | CO[Si](OC)(OC)OC |
| vapor density | 5.25 (vs air) |
| vapor pressure | 13 hPa ( 20 °C) |
| Application: | Tetramethyl orthosilicate (TMOS) is popularly used in the sol-gel synthesis of silicates1 and chromium-doped silicates and in the formation of hexagonal mesoporous silica layers. |
| Application: | Used in the sol-gel synthesis of chromium-doped silicates and in the formation of hexagonal mesoporous silica layers. |
| Packaging: | 100, 500 g in glass bottle |
| Symbol |    GHS02,GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H226 - H315 - H318 - H330 |
| Precautionary statements | P210 - P233 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | T+ |
| Risk Statements | 10-26-37/38-41 |
| Safety Statements | 16-26-36/37/39-45 |
| RIDADR | UN 2606 3(6.1) / PGI |
| WGK Germany | WGK 3 |
| Flash Point(F) | 78.8 °F - closed cup |
| Flash Point(C) | 26 °C - closed cup |
| Purity | 98% |
| bp | 121-122 °C (lit.) |
| mp | −4 °C (lit.) |
| Density | 1.023 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352300 |