333859

Sigma-Aldrich

Tetraethyl orthosilicate

99.999% trace metals basis

Synonym(s):
Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethyl silicate, Tetraethoxysilane, Tetraethoxysilicon(IV)
Linear Formula:
Si(OC2H5)4
CAS Number:
Molecular Weight:
208.33
Beilstein/REAXYS Number:
1422225
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

vapor density

7.2 (vs air)

Quality Level

vapor pressure

<1 mmHg ( 20 °C)

assay

99.999% trace metals basis

form

liquid

refractive index

n20/D 1.382 (lit.)

bp

168 °C (lit.)

density

0.933 g/mL at 20 °C (lit.)

SMILES string

CCO[Si](OCC)(OCC)OCC

InChI

1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3

InChI key

BOTDANWDWHJENH-UHFFFAOYSA-N

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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.

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.
Commonly used as a precursor to prepare xerogel
Will interact with dodecylamine in the formation of intercalation compounds of H+-magadiite and used in a study of mixed-metal bioactive glasses.

Packaging

25, 100 mL in glass bottle

Pictograms

FlameExclamation mark

Signal Word

Warning

Hazard Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

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

Fabrication of tunable silica-mineralized nanotubes using flagella as bio-templates
Jo W, et al.
Nanotechnology, 23(5) (2012)
Deposition of thick TEOS PECVD silicon oxide layers for integrated optical waveguide applications
Bulla DAP and Morimoto NI
Thin Solid Films, 334(1-2), 60-64 (1998)
Mesoporous oxides and their applications to hydrogen storage.
Hunt AJ, et al.
Material Matters, 4(2), 47-54 (2009)
Rod-Shaped Assemblies of FePt-PtTe2 through Dynamic Templating
Yan Q, et al.
Advanced Mat., 19(24), 4358-4363 (2007)
Deposition of thick TEOS PECVD silicon oxide layers for integrated optical waveguide applications
Bulla DAP and Morimoto NI
Thin Solid Films, 334, 60-64 (1998)
Articles
From Form to Function: Molding Porous Materials in Three Dimensions by Colloidal Crystal Templating
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Mesoporous Oxides and Their Applications to Hydrogen Storage
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Recent demand for electric and hybrid vehicles, coupled with a reduction in prices, has caused lithium-ion batteries (LIBs) to become an increasingly popular form of rechargeable battery technology.
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