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86578

Sigma-Aldrich

Ortosilicato de tetraetilo

≥99.0% (GC)

Sinónimos:

Silicato de tetraetilo, TEOS, Tetraetoxisilano, Tetraetoxisilicio(IV), Tetraetóxido de silicio, Éster tetraetílico del ácido ortosilícico

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250 ML
$56.60
1 L
$137.00

$56.60

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250 ML
$56.60
1 L
$137.00

About This Item

Fórmula lineal:
Si(OC2H5)4
Número de CAS:
78-10-4
Peso molecular:
208.33
Beilstein/REAXYS Number:
1422225
EC Number:
201-083-8
MDL number:
MFCD00009062
UNSPSC Code:
12352103
PubChem Substance ID:
57653167
NACRES:
NA.22
assay:
≥99.0% (GC)
bp:
168 °C (lit.)
vapor pressure:
<1 mmHg ( 20 °C)

$56.60

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vapor density

7.2 (vs air)

Quality Level

200

vapor pressure

<1 mmHg ( 20 °C)

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.)

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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General description

El ortosilicato de tetraetilo (TEOS) es un material inorgánico que puede usarse como fuente de sílice para la síntesis de materiales a base de sílice como el dióxido de silicio,[1] los oxicarburos de silicio,[2] el silanol,[3] el polímero de siloxano[4] y películas delgadas de organosilicio[5] para una variedad de aplicaciones. Puede utilizarse también en la síntesis de membranas mezcladas y en la producción de aerogeles.[6] Otras aplicaciones son los revestimientos para alfombras y otros objetos.[7]

application

El ortosilicato de tetraetilo (TEOS) puede utilizarse:
  • Como reactivo junto con el cloruro férrico en la síntesis de dihidropirimidinonas.[8]
  • Como modificador en la fabricación del sensor de humedad, poli(2-acrilamido-2-metilpropano sulfonato) (poli-AMPS).[9]
  • Como medio para sintetizar triarilaminas y éteres diarílicos a través de la reacción de Ullmann sin ligando, catalizada por cobre.[10]
  • Como precursor para la preparación de xerogel de sílice que encuentra aplicación en los portadores de fármacos.[11]
  • Como precursor para la síntesis de partículas esféricas de sílice por el proceso Stober.[12]

Interaccionará con la dodecilamina en la formación de compuestos de intercalación de H+-magadiita y se utilizó en un estudio de vidrios bioactivos de metales mixtos.
Utilizado normalmente como precursor para preparar xerogeles

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Warning

Hazard Classifications

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

target_organs

Respiratory system

Storage Class

3 - Flammable liquids

wgk_germany

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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Certificados de análisis (COA)

Lot/Batch Number
BCCL6852
BCCL3327
BCCJ8250
BCCJ6533
BCCH9552

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Encuentre la documentación para los productos que ha comprado recientemente en la Biblioteca de documentos.

Visite la Librería de documentos

Silica xerogels as pharmaceutical drug carriers
Quintanar-Guerrero D, et al.
Expert Opinion on Drug Delivery, 5(6), 485-498 (2009)
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)
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)
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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 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?

  7. 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?

  8. 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?

  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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