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86578 Aldrich

Tetraethyl orthosilicate

≥99.0% (GC)

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

  • CAS Number 78-10-4

  • Linear Formula Si(OC2H5)4

  • Molecular Weight 208.33

  •  Beilstein Registry Number 1422225

  •  EC Number 201-083-8

  •  MDL number MFCD00009062

  •  PubChem Substance ID 57653167

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Properties

Related Categories Chemical Synthesis, Organometallic Reagents, Organosilicon, Silicates
vapor density   7.2 (vs air)
vapor pressure   <1 mmHg ( 20 °C)
InChI Key   BOTDANWDWHJENH-UHFFFAOYSA-N
assay   ≥99.0% (GC)
form   liquid
refractive index   n20/D 1.382(lit.)
  n20/D 1.383
bp   168 °C(lit.)
density   0.933 g/mL at 20 °C(lit.)

Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Application

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.

Packaging

1 L in glass bottle

250 mL in glass bottle

Price and Availability


Cross-Coupling Guide
Safety & Documentation

Safety Information

Symbol 
Signal word 
Warning
Hazard statements 
RIDADR 
UN1292 - class 3 - PG 3 - Tetraethyl silicate
WGK Germany 
1
RTECS 
VV9450000
Flash Point(F) 
113 °F
Flash Point(C) 
45 °C

Frequently Asked Questions

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. http://www.sigmaaldrich.com/etc/medialib/docs/Sigma-Aldrich/General_Information/shippingandlong-termstoragev3.Par.0001.File.tmp/shippingandlong-termstoragev3.pdf
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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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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Protocols & Articles
Peer-Reviewed Papers
15

References

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