131903
Orthosilicate de tétraéthyle
reagent grade, 98%
Synonyme(s) :
Ester tétraéthylique de l’acide orthosilicique, TEOS, Tétraéthoxysilane
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A propos de cet article
Formule linéaire :
Si(OC2H5)4
Numéro CAS:
Poids moléculaire :
208.33
UNSPSC Code:
12352103
NACRES:
NA.23
PubChem Substance ID:
EC Number:
201-083-8
Beilstein/REAXYS Number:
1422225
MDL number:
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reagent grade
Quality Level
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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Catégories apparentées
General description
Tetraethyl orthosilicate (TEOS) is a high-purity (98%) colorless liquid silicon alkoxide widely used as a moisture-sensitive precursor to silicon dioxide (SiO₂). Through sol–gel hydrolysis and condensation, TEOS enables the formation of silica-based networks, aerogels, thin films, nanoparticles, and mesoporous structures. Its controlled reactivity and compatibility with catalysts and templating agents make it valuable in the chemical crosslinking of polymers and the fabrication of advanced materials for coatings, catalysis, hydrogels, biomedical devices, and nanoparticle-based drug delivery systems.
Application
Couramment utilisé comme précurseur dans la préparation de xérogel
Interagit avec la dodécylamine dans la formation de composés d'intercalation de magadiite-H+ et utilisé dans une étude portant sur des verres bioactifs comprenant un mélange de métaux.
Tetraethyl orthosilicate can be used:
- 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.
- An anti-solvent to fabricate an 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 precursor to prepare the xerogel.
Features and Benefits
- Excellent adhesion on substrates
- Uniform film deposition
- Cross-linker to introduce polymer strands into hydrogel
signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3
target_organs
Respiratory system
Classe de stockage
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
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