86578
Orthosilicate de tétraéthyle
≥99.0% (GC)
Synonyme(s) :
Ester tétraéthylique de l’acide orthosilicique, Silicate de tétraéthyle, Tétraéthyl silicate, TEOS, Tétraéthoxyde de silicium, Tétraéthoxysilane, Tétraéthoxysilicium(IV)
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InChI key
BOTDANWDWHJENH-UHFFFAOYSA-N
InChI
1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
SMILES string
CCO[Si](OCC)(OCC)OCC
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.)
Quality Level
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General description
Application
- Comme réactif, avec du chlorure ferrique, dans la synthèse de dihydropyrimidinones.
- Comme agent modificateur dans la fabrication d′un matériau détectant l′humidité, le poly(sulfonate de 2-acrylamido-2-méthylpropane) (poly-AMPS).
- Comme milieu de synthèse de triarylamines et d′éthers diaryliques via une réaction d′Ullmann sans ligand catalysée par du cuivre.
- Comme précurseur pour la préparation d′un xérogel de silice, dont une application porte sur les vecteurs pharmaceutiques de médicaments.
- Comme précurseur dans la synthèse de particules de silice sphériques par le procédé Stöber.
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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How does the storage temperature relate to shipping conditions?
The storage conditions that a Sigma-Aldrich catalog and label recommend for products are deliberately conservative. For many products, long-term storage at low temperatures will increase the time during which they are expected to remain in specification and therefore are labeled accordingly. Where short-term storage, shipping time frame, or exposure to conditions other than those recommended for long-term storage will not affect product quality, Sigma-Aldrich will ship at ambient temperature. The products sensitive to short-term exposure to conditions other than their recommended long-term storage are shipped on wet or dry ice. Ambient temperature shipping helps to control shipping costs for our customers. At any time, our customers can request wet- or dry-ice shipment, but the special handling is at customer expense if our product history indicates that the product is stable for regular shipment. See Shipping and Storage for more information.
Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
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What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
What type of applications can Product No. 86578, Tetraethyl orthosilicate (TEOS), be used in?
TEOS can be used to synthesize sol-gels or aerogels.
How do you create a sol-gel with Tetraethyl orthosilicate (TEOS), Product No. 86578?
TEOS can be polymerized with water; the polymerization is based on the hydrolysis or the Si-O-Et groups through forming networks linked by Si-O-Si groups.
How can I accelerate the polymerization of Tetraethyl orthosilicate (TEOS), Product No. 86578?
The polymerization of TEOS can be accelerated or driven to completion by the addtion of acid or base, both of which serve as a catalyst.
What are the applications of sol-gels formed from Tetraethyl orthosilicate (TEOS), Product No. 86578?
One of the most improtant application of the sol-gel process is the snythesis of zeolites. Other applications are optical ceramic materials or functionalized biosensors.
What is the vapor pressure of Tetraethyl orthosilicate (TEOS), Product No. 86578, at room temperature?
The vapor pressure of TEOS at room temperature is 1.5 Torr.
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