Tetraethyl orthosilicate
ALDRICH/333859 - 99.999% trace metals basis
Synonym: Orthosilicic acid tetraethyl ester; Silicon tetraethoxide; TEOS; Tetraethoxysilane; Tetraethoxysilicon(IV); Tetraethyl silicate; Orthosilicic acid tetraethyl ester; TEOS; Tetraethoxysilane
CAS Number: 78-10-4
Empirical Formula (Hill Notation): C8H20O4Si
Molecular Weight: 208.33
EC Number: 201-083-8
MDL Number: MFCD00009062
Linear Formula: Si(OC2H5)4
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 333859-100ML.
| assay | 99.999% trace metals basis |
| bp | 168 °C (lit.) |
| density | 0.933 g/mL at 20 °C (lit.) |
| form | liquid |
| InChI | 1S/C8H20O4Si/c1-5-9-13(10 |
| InChI key | BOTDANWDWHJENH-UHFFFAOYSA |
| Quality Level | 200  |
| refractive index | n |
| SMILES string | CCO[Si](OCC)(OCC)OCC |
| vapor density | 7.2 (vs air) |
| vapor pressure | <1 mmHg ( 20 °C) |
| Application: | Commonly used as a precursor to prepare xerogel |
| Application: | TEOS is majorly used as a silicon source in the synthesis of silicon oxide which can be further used in a variety of optoelectronics based applications. It can also be used in the formation of hybrid coatings for potential usage in corrosion protection. |
| Application: | Will interact with dodecylamine in the formation of intercalation compounds of H+-magadiite and used in a study of mixed-metal bioactive glasses. |
| General description: | Tetraethyl orthosilicate (TEOS) is an inorganic material used as a precursor for the synthesis of silica-based materials by methods such as sol gel technique, due to its high affinity to water. It can also be used in the synthesis of blended membranes. |
| Packaging: | 25, 100 mL in glass bottle |
| Symbol |   GHS02,GHS07 |
| Signal word | Warning |
| Hazard statements | H226 - H319 - H332 - H335 |
| Precautionary statements | P210 - P233 - P240 - P241 - P304 + P340 + P312 - P305 + P351 + P338 |
| Hazard Codes | Xn |
| Risk Statements | 10-20-36/37 |
| RIDADR | UN1292 - class 3 - PG 3 - Tetraethyl silicate |
| WGK Germany | WGK 1 |
| Flash Point(F) | 113.0 °F - closed cup |
| Flash Point(C) | 45 °C - closed cup |
| Purity | 99.999% trace metals basis |
| bp | 168 °C (lit.) |
| Density | 0.933 g/mL at 20 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352300 |