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86578

Sigma-Aldrich

Tetraethyl orthosilicate

≥99.0% (GC)

Synonim(y):

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

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250 ML
165,00 zł
1 L
505,00 zł

165,00 zł

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250 ML
165,00 zł
1 L
505,00 zł

About This Item

Wzór liniowy:
Si(OC2H5)4
Numer CAS:
78-10-4
Masa cząsteczkowa:
208.33
Beilstein:
1422225
Numer WE:
201-083-8
Numer MDL:
MFCD00009062
Kod UNSPSC:
12352103
Identyfikator substancji w PubChem:
57653167
NACRES:
NA.22
Próba:
≥99.0% (GC)
bp:
168 °C (lit.)
ciśnienie pary:
<1 mmHg ( 20 °C)

165,00 zł

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gęstość pary

7.2 (vs air)

Poziom jakości

200

ciśnienie pary

<1 mmHg ( 20 °C)

Próba

≥99.0% (GC)

Formularz

liquid

współczynnik refrakcji

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

bp

168 °C (lit.)

gęstość

0.933 g/mL at 20 °C (lit.)

ciąg SMILES

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

Klucz InChI

BOTDANWDWHJENH-UHFFFAOYSA-N

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Opis ogólny

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]

Zastosowanie

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]

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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Piktogramy

FlameExclamation mark
GHS02,GHS07

Hasło ostrzegawcze

Warning

Zwroty wskazujące rodzaj zagrożenia

H226,H319,H332,H335

Klasyfikacja zagrożeń

Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3

Organy docelowe

Respiratory system

Kod klasy składowania

3 - Flammable liquids

Klasa zagrożenia wodnego (WGK)

WGK 1

Temperatura zapłonu (°F)

113.0 °F - closed cup

Temperatura zapłonu (°C)

45 °C - closed cup

Środki ochrony indywidualnej

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Wybierz jedną z najnowszych wersji:

Certyfikaty analizy (CoA)

Lot/Batch Number
BCCL6852
BCCL3327
BCCJ8250
BCCJ6533
BCCH9552

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Jeśli potrzebujesz konkretnej wersji, możesz wyszukać konkretny certyfikat według numeru partii lub serii.

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Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.

Odwiedź Bibliotekę dokumentów

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)
The Organosilicon thin Film Deposited Using an Atmospheric Pressure Dual-Frequency 50 kHz/33 MHz Frequency MicroPlasma Jet
Yuan QH, et al.
Contributions to Plasma Physics, 56(9), 870-877 (2016)
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)
Modification of synthetic carpet using chitosan-titania nanocomposite for self-cleaning purposes
Sulaeman MI, et al.
AIP Conference Proceedings, 2175(1), 020077-020077 (2019)
Ullmann reaction in tetraethyl orthosilicate: a novel synthesis of triarylamines and diaryl ethers
Zhao Y, et al.
Chemical Communications (Cambridge, England), 30(449), 3186-3188 (2007)
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Questions

1–10 of 12 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  3. What is the thermal conductivity of TEOS?

    1 answer

    1. Unfortunately, the thermal conductivity of this product is not determined.

      Helpful?

  4. What is the electrical conductivity or resistivity of TEOS

    1 answer

    1. This product is not tested for electrical conductivity. The compound is not expected to be a conductive material. The presence of TEOS in various coatings may impact the conductivity or resistivity of a given target compound, such as a metallic nanoparticle. See the links below to review articles that may be of interest:
      https://www.researchgate.net/figure/Effect-of-the-addition-of-TEOS-on-a-density-b-resistivity-c-residual-magnetic_fig5_371096514
      https://link.springer.com/article/10.1007/s12633-019-00180-y

      Helpful?

  5. According to the theise, TEOS was used in units of g. Do you sell powder or solid TEOS?

    1 answer

    1. Tetraethyl orthosilicate is only available in the liquid state. The melting point of the pure compound is -82.5 °C. The density of this material is 0.933 g/mL.
      See the link below to review the PubChem profile.
      https://pubchem.ncbi.nlm.nih.gov/compound/Tetraethyl-orthosilicate#section=Melting-Point

      Helpful?

  6. How can I accelerate the polymerization of Tetraethyl orthosilicate (TEOS), Product No. 86578?

    1 answer

    1. 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.

      Helpful?

  7. How do you create a sol-gel with Tetraethyl orthosilicate (TEOS), Product No. 86578?

    1 answer

    1. 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.

      Helpful?

  8. What is the vapor pressure of Tetraethyl orthosilicate (TEOS), Product No. 86578, at room temperature?

    1 answer

    1. The vapor pressure of TEOS at room temperature is 1.5 Torr.

      Helpful?

  9. What are the applications of sol-gels formed from Tetraethyl orthosilicate (TEOS), Product No. 86578?

    1 answer

    1. 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.

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  10. What is the Department of Transportation shipping information for this product?

    1 answer

    1. 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.

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