Sigma-Aldrich 86578 Tetraethyl orthosilicate ≥99.0% (GC) CAS No.: 78-10-4 250 1 L

Category

Diğer Analitik Kimyasallar , Moleküler Biyoloji ve Biyokimya Ürünleri

Brand

SIGMA-ALDRICH

Stock Code

LB.SA.86578-1L

Kısa Bilgi

Synonym(s): Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate Linear Formula: Si(OC2H5)4 CAS Number: 78-10-4 Molecular Weight: 208.33 Beilstein: 1422225 EC Number: 201-083-8 MDL number: MFCD00009062 UNSPSC Code: 12352103 PubChem Substance ID: 57653167 NACRES: NA.22

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Stok Sorunuz

Sigma-Aldrich 86578 Tetraethyl orthosilicate ≥99.0% (GC) CAS No.: 78-10-4

Synonym(s): Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate
Linear Formula: Si(OC₂H₅)₄
CAS Number: 78-10-4
Molecular Weight: 208.33
Beilstein: 1422225
EC Number: 201-083-8
MDL number: MFCD00009062
UNSPSC Code: 12352103
PubChem Substance ID: 57653167
NACRES: NA.22

PROPERTIES

vapor density 7.2 (vs air)
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

DESCRIPTION
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,^[1] silicon oxycarbides,^[2] silanol,^[3]siloxane polymer,^[4] and organosilicon thin films^[5] for a variety of applications. It can also be used in the synthesis of blended membranes, and the production of aerogel.^[6] Other applications include coatings for carpets and other objects.[7]
Application
Commonly used as a precursor to prepare xerogel
Tetraethyl orthosilicate (TEOS) can be used:
- As a reagent along with ferric chloride in the synthesis of dihydropyrimidinones.^[8]
- As a modifier in fabrication of humidity sensing material, poly(2-acrylamido-2-methylpropane sulfonate) (poly-AMPS).^[9]
- As a medium to synthesize triarylamines and diaryl ethers via copper catalyzed, ligand free-Ullmann reaction.^[10]
- As a precursor for the preparation of silica xerogel which finds application in pharmaceutical drug carriers.^[11]
- As a precursor for the synthesis of spherical silica particles by Stober process.^[12]
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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