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86578

Tetraethyl orthosilicate

≥99.0% (GC)

Synonym(s):

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

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About This Item

Linear Formula:
Si(OC2H5)4
CAS Number:
78-10-4
Molecular Weight:
208.33
UNSPSC Code:
12352103
NACRES:
NA.22
PubChem Substance ID:
57653167
EC Number:
201-083-8
Beilstein/REAXYS Number:
1422225
MDL number:
MFCD00009062
Assay:
≥99.0% (GC)
Technique(s):
GC/GC: suitable
Bp:
168 °C (lit.)
Vapor pressure:
<1 mmHg ( 20 °C)
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vapor density

7.2 (vs air)

Quality Level

200

vapor pressure

<1 mmHg ( 20 °C)

assay

≥99.0% (GC)

form

liquid

technique(s)

GC/GC: suitable

refractive index

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

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

General description

Tetraethyl orthosilicate (TEOS) is an inorganic material that can be used as a silica source for the synthesis of silica-based materials such as silicon dioxide, silicon oxycarbides, silanol, siloxane polymer, and organosilicon thin films for a variety of applications. It can also be used in the synthesis of blended membranes, and the production of aerogel. Other applications include coatings for carpets and other objects.

Application

Tetraethyl orthosilicate (TEOS) can be used:
  • As a reagent along with ferric chloride in the synthesis of dihydropyrimidinones.
  • As a modifier in fabrication of humidity sensing material, poly(2-acrylamido-2-methylpropane sulfonate) (poly-AMPS).
  • As a medium to synthesize triarylamines and diaryl ethers via copper catalyzed, ligand free-Ullmann reaction.
  • As a precursor for the preparation of silica xerogel which finds application in pharmaceutical drug carriers.
  • As a precursor for the synthesis of spherical silica particles by Stober process.

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.

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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

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

Regulatory Information

危险化学品

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Certificates of Analysis (COA)

Lot/Batch Number
BCCG5120
BCCG3312
BCCG3313
BCCF9426
BCCF4830

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Use of poly (2-acrylamido-2-methylpropane sulfonate) modified with tetraethyl orthosilicate as sensing material for measurement of humidity
Su PG, et al.
Analytica Chimica Acta, 1-2(449), 103-109 (2001)
Ferric chloride/tetraethyl orthosilicate as an efficient system for synthesis of dihydropyrimidinones by Biginelli reaction
Cepanec I, et al.
Tetrahedron, 17(61), 4275-4280 (2005)
Removal of Cu (II) and Fe (II) ions through thin film composite (TFC) with hybrid membrane
Sulaiman NA, et al.
Journal of Engineering Science and Technology, 36-49 (2016)
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Global Trade Item Number

SKUGTIN
86578-250ML04061833041574
86578-1L04061838254436