Tetraethoxysilane (TEOS) CAS 78-10-4
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Chemical Name: Tetraethoxysilane (TEOS)
CAS No.: 78-10-4
Molecular Fomula: C8H20O4Si
Molecular weight: 208.33
Appearance: Colourless, transparent liquid with a slight odour.
Tetraethoxysilane (TEOS): The Complete Guide
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Description of Tetraethoxysilane (TEOS)
Tetraethyl orthosilicate is the chemical compound with the formula Si(OC2H5)4. Often abbreviated TEOS, it is a colorless liquid that degrades in water. TEOS is the ethyl ether of orthosilicic acid, Si(OH)4. It is a prototypical alkoxide.
TEOS is a tetrahedral molecule. Like its many analogues, TEOS is prepared by alcoholysis of silicon tetrachloride:; SiCl4 + 4 EtOH → Si(OEt)4 + 4 HCl; where Et = C2H5.
Basic Info of Tetraethoxysilane (TEOS)
Chemical Name | Tetraethyl orthosilicate |
Synonyms | ethyl orthosilicate;Silicic acid (H4SiO4), tetraethyl ester;tetraethyl ortosilicate;Silester;tetra-ethyl orthosilicate;Expand |
CAS No. | 78-10-4 |
Molecular Formula | C8H20O4Si |
Molecular Weight | 208.32700 |
PSA | 36.92000 |
LogP | 1.56800 |
Safety Info
RTECS | VV9450000 |
Hazard Class | 3 |
Safety Statements | 16-36/37/39 |
HS Code | 2920909090 |
WGK Germany | 1 |
Packing Group | III |
RIDADR | UN 1292 3/PG 3 |
Risk Statements | R10; R20; R36/37 |
Hazard Codes | Xn |
Signal Word | Warning |
Symbol | GHS02, GHS07 |
Caution Statement | P210; P261; P280; P304 + P340 + P312; P337 + P313; P403 + P235 |
Hazard Declaration | H226; H319; H332; H335 |
Properties
Appearance & Physical State | clear colorless liquid with a faint odor |
Density | 0.934 |
Boiling Point | 166-169ºC |
Melting Point | -77ºC |
Freezing Point | -77℃ |
Flash Point | 45ºC |
Refractive Index | n20/D 1.382(lit.) |
Water Solubility | Hydrolysis |
Stability | Stable. Flammable. Incompatible with strong oxidizing agents, water, alkalies, mineral acids. |
Storage Condition | Flammables area |
Vapor Density | 7.2 (vs air) |
Vapor Pressure | <1 mm Hg ( 20 °C) |
Numbering system
UNII | 42064KRE49 |
What is Tetraethoxysilane (TEOS)?
With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Tetraethoxysilane (TEOS) which has developed particularly rapidly in recent years. Do you know about Tetraethoxysilane (TEOS)?
The official answer: Tetraethyl orthosilicate, alias Ethyl silicate.
What’s the application of Tetraethoxysilane (TEOS)?
- Used as electrical insulation material, paint, optical glass treatment agent. Also used in organic synthesis.
- Used in the manufacture of chemical-resistant coatings, heat-resistant coatings, silicone solvents and precision casting adhesives.
- Used as heat-resistant coatings, chemical-resistant coatings, organic synthesis intermediates.
Conclusion
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