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131903

Sigma-Aldrich

Tetraethyl orthosilicate

reagent grade, 98%

Synonyma:

Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate

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About This Item

Lineární vzorec:
Si(OC2H5)4
Číslo CAS:
78-10-4
Molekulová hmotnost:
208.33
Beilstein/REAXYS Number:
1422225
EC Number:
201-083-8
MDL number:
MFCD00009062
UNSPSC Code:
12352103
PubChem Substance ID:
24848042
NACRES:
NA.23

grade

reagent grade

Quality Level

200

vapor density

7.2 (vs air)

vapor pressure

<1 mmHg ( 20 °C)

assay

98%

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 a colorless liquid alkoxide widely used as precursor to deposition of silicon dioxide (SiO2) thin films. It is also utilized in hydrogels, nanoparticle-based drug delivery systems, and chemical crosslinking of polymers.

Application

Tetraethyl orthosilicate can be used:
  • As an anti-solvent to fabricate efficient perovskite layer for inverted planar solar cells with enhanced power conversion efficiency and reproducibility. TEOS helps to achieve high-quality perovskite films with reduced density of defects, and thus slower carrier recombination.
  • As a sol-gel precursor to synthesize SiO2-TiO2 anti-reflective self-cleaning coatings for solar cells.
  • To fabricate nano silica functionalized crosslinked hybrid membranes for proton exchange membrane fuel cell applications. These membranes have better proton conductivity and thermal stability.
  • To prepare poly(vinylidene fluoride)/TEOS matrix separator to enhance the performance of Li-ion batteries. The separator exhibits excellent electrolyte retention and wettability.

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.

Features and Benefits

  • Excellent adhesion on substrates
  • Uniform film deposition
  • Cross-linker to introduce polymer strands into hydrogel

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Warning

Hazard Classifications

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

target_organs

Respiratory system

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

113.0 °F - closed cup

flash_point_c

45 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Osvědčení o analýze (COA)

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