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Silicic Acid Esters | Silicates | Polysilicates | Orthosilicates | Silane Passivating Agents

Chemical Name:

Tetraethoxysilane (TEOS) .
Synonym: Тетраэтокси-силан
Tetraethyl Orthosilicate
Ethyl Polysilicate 28
Ethyl Silicate 28

Chemical Structure:

Typical Physical Properties:

Chemical Name:
CAS No.:
Molecular Weight:
Boiling Point:
168°C [760mmHg]
Flash Point:
Color and Appearance:
Colorless transparent liquid
Density [25°C]:
Refractive Index [25°C]:
1.3838 [25°C]
Min.99.0% by GC


Silicon esters are silicon compounds that contain an oxygen bridge from silicon to an organic group, for example, Si-OR. YokoSil™ E20, the ethyl ester of orthosilicic acid, is a colorless, low-viscosity liquid with an SiO2 content of 28.5%.


The tetraalkyl orthosilicates ( also called orthosilicic acid esters) most commonly used as starting materials for sol-gel.

Polysilicic acidesters are condensation products obtained by incomplete hydrolysis or orthosilicic acid esters. They are also be used as starting materials for the sol-gel process.

YokoSil™ E20 typical application:
Be hydrolyzed to form silicon dioxide (silica).
Crosslinkers in silicone rubber systems
Drying agents in sealing compositions
Inorganic binder for refractory fillers and pigments
Coating material for pigments, fibers and other surfaces
Chemical intermediate

Packing: Net weight 210L steel drum or 1000L IBC container, for more details, please visit Packing Centre.

Storage:In the unopened container it has a shelf life of at least 12 months.

Trade Terms
The trade terms in our formal quotation shall be governed and interpreted under the provisions of 2000 INCOTERMS provided by International Chamber of Commerce (ICC). Order now


Copyright@2007 Asia Silicones Association Limited.
YokoSil™ is the trademark of Asia Silicones Association Limited.