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Tetraethyl orthosilicate

99.999% trace metals basis

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Synonym(s):
Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate
Linear Formula:
Si(OC2H5)4
CAS Number:
Molecular Weight:
208.33
Beilstein:
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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This Item
86578131903759414
vapor pressure

<1 mmHg ( 20 °C)

vapor pressure

<1 mmHg ( 20 °C)

vapor pressure

<1 mmHg ( 20 °C)

vapor pressure

<1 mmHg ( 20 °C)

assay

99.999% trace metals basis

assay

≥99.0% (GC)

assay

98%

assay

≥99.5% (GC)

form

liquid

form

liquid

form

liquid

form

liquid

refractive index

n20/D 1.382 (lit.)

refractive index

n20/D 1.382 (lit.), n20/D 1.383

refractive index

n20/D 1.382 (lit.)

refractive index

n20/D 1.382 (lit.)

bp

168 °C (lit.)

bp

168 °C (lit.)

bp

168 °C (lit.)

bp

168 °C (lit.)

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.

Pictograms

FlameExclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

113.0 °F - closed cup

Flash Point(C)

45 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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)
Fabrication of tunable silica-mineralized nanotubes using flagella as bio-templates
Jo W, et al.
Nanotechnology, 23(5) (2012)
Sol-gel-derived hybrid coatings for corrosion protection
Chou TP, et al.
Journal of Sol-Gel Science and Technology, 26(1-3), 321-327 (2003)
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)
A performance evaluation of direct methanol fuel cell using impregnated tetraethyl-orthosilicate in cross-linked polymer membrane
Jung DH, et al.
International Journal of Hydrogen Energy, 26(12), 1263-1269 (2001)

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