VAQORATetraethyl orthosilicate, 99.999%
Synonyms: Orthosilicic acid tetraethyl ester · Silicon tetraethoxide · TEOS · Tetraethoxysilane
CAS No.78-10-4
FormulaC8H20O4Si
Mol. weight208.33
Catalogue No.VQ-011149
Purity99.999%
HSN29209099
Tetraethyl orthosilicate (CAS 78-10-4) – organosilicon compound, Puriss grade, 99.999%. C8H20O4Si, MW 208.33. Vaqora Chemicals: COA, global shipping.
Batch COA with every lot
16-section GHS SDS
Export to 120+ countries
DG-compliant packing
About Tetraethyl orthosilicate, 99.999%
Tetraethyl orthosilicate is an organosilicon compound (Puriss grade) carrying the CAS registry number 78-10-4, specified at 99.999% purity. The compound has the formula C8H20O4Si, corresponding to a molecular weight of 208.33 g/mol. The IUPAC name is tetraethyl silicate. Common synonyms include Orthosilicic acid tetraethyl ester and Silicon tetraethoxide.
It is supplied as a liquid. Literature values give a boiling point of 168 °C and a density of 0.933 g/mL at 20 °C. Keep the material at room temperature in a dry place and protect it from moisture. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.
Key uses span polymer and resin production, paints, coatings and inks and electronics and thin films. Buyers come mainly from pharmaceutical manufacturing, academic and industrial research and electronics and semiconductors.
We offer Tetraethyl orthosilicate in 25 mL and 100 mL packs with a batch-specific COA, and ship to customers worldwide.
Typical applications
- Polymer & resin production
- Paints, coatings & inks
- Electronics & thin films
Industries
Specifications & identifiers
| Product name | Tetraethyl orthosilicate, 99.999% |
|---|---|
| Catalogue No. | VQ-011149 |
| CAS Number | 78-10-4 |
| IUPAC name | tetraethyl silicate |
| Molecular formula | C8H20O4Si |
| Molecular weight | 208.33 g/mol |
| Exact mass | 208.1131 |
| Grade | Puriss |
| Purity / assay | 99.999% |
| HSN code | 29209099 |
| InChIKey | BOTDANWDWHJENH-UHFFFAOYSA-N |
| SMILES | CCO[Si](OCC)(OCC)OCC |
| PubChem CID | 6517 |
| Physical form | Liquid |
|---|---|
| Appearance | Liquid |
| Boiling point | 168 °C |
| Density | 0.933 g/mL at 20 °C |
| H-bond donors / acceptors | 0 / 4 |
| TPSA | 36.9 Ų |
| Storage | Room temperature |
| UN number | UN 1292 |
| Synonyms | Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Dynasil A, Silicon ethoxide, Silikan L, Ethyl orthosilicate, Etylu krzemian, Silane, tetraethoxy-, Tetraethylorthosilicate, Silicic acid, tetraethyl ester |
Safety & hazard information (GHS)
Signal word: Warning
Hazard statements
H226Flammable liquid and vaporH319Causes serious eye irritationH332Harmful if inhaledH335May cause respiratory irritation
Precautionary statements: P210, P233, P240, P241, P242, P243, P261, P264 + P265, P271, P280, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P317, P319, P337 + P317, P370 + P378, P403 + P233, P403 + P235, P405, P501
Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.
Documents
Other grades of CAS 78-10-4
Frequently asked questions
What is the CAS number of Tetraethyl orthosilicate, 99.999%?
The CAS Registry Number of Tetraethyl orthosilicate, 99.999% is 78-10-4. It is also known as Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS.
What is the molecular formula and molecular weight of Tetraethyl orthosilicate, 99.999%?
Tetraethyl orthosilicate, 99.999% has the molecular formula C8H20O4Si and a molecular weight of 208.33 g/mol. Its IUPAC name is tetraethyl silicate.
Which grade and pack sizes of Tetraethyl orthosilicate, 99.999% can I order?
We supply Tetraethyl orthosilicate, 99.999% in Puriss (99.999%) grade, in 25 mL, 100 mL packs. Larger bulk quantities and custom packing are quoted on request.
Do you provide a COA and SDS with Tetraethyl orthosilicate, 99.999%?
Yes. Every lot of Tetraethyl orthosilicate, 99.999% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.
Can Tetraethyl orthosilicate, 99.999% be shipped internationally?
Yes. Tetraethyl orthosilicate, 99.999% is classified as hazardous (UN 1292), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.
How should Tetraethyl orthosilicate, 99.999% be stored?
Room temperature. Keep the container tightly closed and refer to the SDS for full handling guidance.
Enquire about Tetraethyl orthosilicate, 99.999%
We reply within one business day with price, pack options, lead time and documentation.
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