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86578

Sigma-Aldrich

tetra-etil ortosilicato

≥99.0% (GC)

Sinonimo/i:

Estere tetraetilico dell’acido ortosilicico, Silicio tetra-etossido, TEOS, Tetra-etossi-silano, tetra-etil silicato, tetra-etossilicio(IV), tetra-etossi-silano

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250 ML
CHF 44.10
1 L
CHF 133.00

CHF 44.10

Spedizione prevista il04 aprile 2025

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Cambia visualizzazione
250 ML
CHF 44.10
1 L
CHF 133.00

About This Item

Formula condensata:
Si(OC2H5)4
Numero CAS:
78-10-4
Peso molecolare:
208.33
Beilstein:
1422225
Numero CE:
201-083-8
Numero MDL:
MFCD00009062
Codice UNSPSC:
12352103
ID PubChem:
57653167
NACRES:
NA.22
Saggio:
≥99.0% (GC)
P. ebollizione:
168 °C (lit.)
Tensione di vapore:
<1 mmHg ( 20 °C)

CHF 44.10

Spedizione prevista il04 aprile 2025

Richiedi un ordine bulk

Densità del vapore

7.2 (vs air)

Livello qualitativo

200

Tensione di vapore

<1 mmHg ( 20 °C)

Saggio

≥99.0% (GC)

Stato

liquid

Indice di rifrazione

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

P. ebollizione

168 °C (lit.)

Densità

0.933 g/mL at 20 °C (lit.)

Stringa SMILE

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
BOTDANWDWHJENH-UHFFFAOYSA-N

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Descrizione generale

[1][2][3][4][5] 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]

Applicazioni

Il tetraetil-ortosilicato (TEOS) può essere usato:
  • Come reagente in congiunzione con cloruro ferrico nella sintesi di di-idropirimidoni.[8]
  • Come modificante nella formulazione di materiale sensibile alla umidità, poli(2-acrilammido-2-metilpropano solfonato) (poli-AMPS).[9]
  • Come un mezzo per la sintesi di triaril-ammine e diaril-eteri via reazione di Ullmann esente da leganti catalizzata da rame[10]
  • Come un precursore per preparare xerogel di silice che trova applicazioni nel trasporto di farmaci.[11]
  • Come un precursore della sintesi di particelle sferiche di silice nel processo Stober.[12]

Interagisce con dodecil-ammina nella formazione di composti di intercalazione di H+-magadiite e usati in uno studio di vetri bioattivi con metalli misti.
Usato comunemente come precursore nella preparazione di xerogel

Pittogrammi

FlameExclamation mark
GHS02,GHS07

Avvertenze

Warning

Indicazioni di pericolo

H226,H319,H332,H335

Classi di pericolo

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

Organi bersaglio

Respiratory system

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

113.0 °F - closed cup

Punto d’infiammabilità (°C)

45 °C - closed cup

Dispositivi di protezione individuale

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

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Certificati d'analisi (COA)

Lot/Batch Number
BCCL6852
BCCL3327
BCCJ8250
BCCJ6533
BCCH9552

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I documenti relativi ai prodotti acquistati recentemente sono disponibili nell’Archivio dei documenti.

Visita l’Archivio dei documenti

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)
Silica xerogels as pharmaceutical drug carriers
Quintanar-Guerrero D, et al.
Expert Opinion on Drug Delivery, 5(6), 485-498 (2009)
Preparation of silicon oxycarbide glass fibers from organically modified silicates
Hu, Yi
Journal of materials science & technology, 35(12), 3155-3159 (2000)
Preparation of spherical silica particles by Stober process with high concentration of tetra-ethyl-orthosilicate
Wang XD, et al.
Journal of Colloid and Interface Science, 1(341), 23-29 (2010)
A spectroscopic study of an anhydrous tetraethyl orthosilicate-boric acid-ethanol system
Zha Congji, et al.
Journal of Sol-Gel Science and Technology, 13(1-3), 103-107 (1998)
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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.

      Helpful?

  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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1–10 of 12 Questions  

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