Tetraethyl orthosilicate
Synonym(s):TEOS;Tetraethyl orthosilicate;Tetraethoxysilane;Tetraethyl silicate;Tetraethoxysilicon(IV)
- CAS NO.:78-10-4
- Empirical Formula: C8H20O4Si
- Molecular Weight: 208.33
- MDL number: MFCD00009062
- EINECS: 201-083-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-01-16 16:12:45
What is Tetraethyl orthosilicate?
Description
Tetraethyl orthosilicate (TEOS) is an ester of orthosilicic acid, which exists in small amounts in nature wherever silica is in contact with water. The ester is also known by several other names, including ethyl silicate (which is somewhat ambiguous), silicon tetraethoxide, and tetraethoxysilane.
In a landmark paper published in 1928, A. W. Dearing and E. Emmet Reid* at Johns Hopkins University (Baltimore) reported improved syntheses of various alkyl orthosilicates. TEOS was obtained in 70% yield by slowly adding silicon tetrachloride (SiCl4) to cold anhydrous ethanol, followed by removing byproduct hydrogen chloride with a stream of dry air. The reaction system must be rigorously free of water because even though TEOS is only slightly soluble in water, it hydrolyzes to form silica and ethanol. The reaction is the basis of modern TEOS production.
TEOS has multiple specialty uses, including stone hardening (which arrests the decay of structures and art objects), mortar and cement manufacture, and cross-linking silicone polymers. Its 2020 global market is valued at US$245 million for an estimated production of ≈120,000 t.
The Uses of Tetraethyl orthosilicate
Tetraethyl Orthosilicate is used in the preparation of antidreflective coatings on silicate glass via silicon dioxide. Crosslinking reagent.
What are the applications of Application
Tetraethyl orthosilicate is a commonly used precursor to prepare xerogel & study of mixed-metal bioactive glasses
Properties of Tetraethyl orthosilicate
Melting point: | -77 °C |
Boiling point: | 168 °C(lit.) |
Density | 0.933 g/mL at 20 °C(lit.) |
Flash point: | 116 °F |
storage temp. | Store below +30°C. |
solubility | Soluble in ethanol and 2-propanol. |
form | Liquid |
appearance | colorless liquid |
color | Colorless |
Water Solubility | Hydrolysis |
FreezingPoint | -77℃ |
Sensitive | Moisture Sensitive |
Safety information for Tetraethyl orthosilicate
Signal word | Warning |
Pictogram(s) |
Flame Flammables GHS02 Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H226:Flammable liquids H319:Serious eye damage/eye irritation H332:Acute toxicity,inhalation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P241:Use explosion-proof electrical/ventilating/lighting/…/equipment. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Tetraethyl orthosilicate
InChIKey | BOTDANWDWHJENH-UHFFFAOYSA-N |
Abamectin manufacturer
JSK Chemicals
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