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131903

Sigma-Aldrich

Orthosilicate de tétraéthyle

reagent grade, 98%

Synonyme(s) :

Ester tétraéthylique de l'acide orthosilicique, TEOS, Tétraéthoxysilane

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25 ML
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250 ML
45,90 €
500 ML
77,60 €
1 L
85,80 €
2.5 L
174,00 €
4 L
357,00 €

39,00 €

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Sélectionner une taille de conditionnement

Changer de vue
25 ML
39,00 €
250 ML
45,90 €
500 ML
77,60 €
1 L
85,80 €
2.5 L
174,00 €
4 L
357,00 €

About This Item

Formule linéaire :
Si(OC2H5)4
Numéro CAS:
78-10-4
Poids moléculaire :
208.33
Beilstein:
1422225
Numéro CE :
201-083-8
Numéro MDL:
MFCD00009062
Code UNSPSC :
12352103
ID de substance PubChem :
24848042
Nomenclature NACRES :
NA.23

39,00 €

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Devis pour commande en gros

Qualité

reagent grade

Niveau de qualité

200

Densité de vapeur

7.2 (vs air)

Pression de vapeur

<1 mmHg ( 20 °C)

Essai

98%

Forme

liquid

Indice de réfraction

n20/D 1.382 (lit.)

pb

168 °C (lit.)

Densité

0.933 g/mL at 20 °C (lit.)

Chaîne 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

Clé InChI

BOTDANWDWHJENH-UHFFFAOYSA-N

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Catégories apparentées

Description générale

Tetraethyl orthosilicate(TEOS) is a colorless liquid alkoxide widely used as precursor to deposition of silicon dioxide (SiO2) thin films. It is also utilized in hydrogels, nanoparticle-based drug delivery systems, and chemical crosslinking of polymers.

Application

Tetraethyl orthosilicate can be used:
  • As an anti-solvent to fabricate efficient perovskite layer for inverted planar solar cells with enhanced power conversion efficiency and reproducibility. TEOS helps to achieve high-quality perovskite films with reduced density of defects, and thus slower carrier recombination.
  • As a sol-gel precursor to synthesize SiO2-TiO2 anti-reflective self-cleaning coatings for solar cells.
  • To fabricate nano silica functionalized crosslinked hybrid membranes for proton exchange membrane fuel cell applications. These membranes have better proton conductivity and thermal stability.
  • To prepare poly(vinylidene fluoride)/TEOS matrix separator to enhance the performance of Li-ion batteries. The separator exhibits excellent electrolyte retention and wettability.

Couramment utilisé comme précurseur dans la préparation de xérogel
Interagit avec la dodécylamine dans la formation de composés d'intercalation de magadiite-H+ et utilisé dans une étude portant sur des verres bioactifs comprenant un mélange de métaux.

Caractéristiques et avantages

  • Excellent adhesion on substrates
  • Uniform film deposition
  • Cross-linker to introduce polymer strands into hydrogel

Pictogrammes

FlameExclamation mark
GHS02,GHS07

Mention d'avertissement

Warning

Mentions de danger

H226,H319,H332,H335

Classification des risques

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

Organes cibles

Respiratory system

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 1

Point d'éclair (°F)

113.0 °F - closed cup

Point d'éclair (°C)

45 °C - closed cup

Équipement de protection individuelle

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

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Certificats d'analyse (COA)

Lot/Batch Number
SDBB1549
SDBB0544
STBL2898
MKCS9334
MKCT6531

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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

Olinka Ramírez-Soto et al.
Science advances, 6(34), eaba4330-eaba4330 (2020-09-03)
Colliding drops are encountered in everyday technologies and natural processes, from combustion engines and commodity sprays to raindrops and cloud formation. The outcome of a collision depends on many factors, including the impact velocity and the degree of alignment, and
Valeria De Matteis et al.
Nanoscale research letters, 14(1), 109-109 (2019-03-30)
The nowadays growing use of nanoparticles (NPs) in commercial products does not match a comprehensive understanding of their potential harmfulness. More in vitro investigations are required to address how the physicochemical properties of NPs guide their engulfment within cells and
Geetha B Heggannavar et al.
ACS omega, 3(7), 8017-8026 (2018-08-09)
Brain glioma is the most lethal type of cancer, with extremely poor prognosis and high relapse. Unfortunately, the treatment of brain glioma is often limited because of the low permeability of anticancer drugs across the blood-brain barrier (BBB). To circumvent
Lin Zhao et al.
ACS nano, 13(7), 7508-7516 (2019-06-15)
Heat at intermediate temperatures (120-220 °C) is in significant demand in both industrial and domestic sectors for applications such as water and space heating, steam generation, sterilization, and other industrial processes. Harnessing heat from solar energy at these temperatures, however
Nils R Blumenthal et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(45), 16124-16129 (2014-10-29)
Extracellular soluble signals are known to play a critical role in maintaining neuronal function and homeostasis in the CNS. However, the CNS is also composed of extracellular matrix macromolecules and glia support cells, and the contribution of the physical attributes
Afficher tous les articles scientifiques apparentés

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Green Synthesis of Nanomaterials

Silica's versatility spans various industries, including biomedical applications.

Synthesis of Melting Gels Using Mono-Substituted and Di-Substituted Alkoxysiloxanes

Synthesis of Melting Gels Using Mono-Substituted and Di-Substituted Alkoxysiloxanes

Nanowire Synthesis: From Top-Down to Bottom-Up

The properties of many devices are limited by the intrinsic properties of the materials that compose them.

Questions

1–8 of 8 Questions  

  1. 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

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  2. 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

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  3. What is the freezing point of Product 131903, Tetraethyl Orthosilicate?

    1 answer

    1. The freezing point is ~85°C.

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  4. How can I purify Product 131903, Tetraethyl Orthosilicate?

    1 answer

    1. Fractionate through an 80cm Podbielniak type column with heated jacket and partial take-off head.  [Purification of Laboratory Chemicals Fourth Ed]

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  5. What is the solubility of Product 131903, Tetraethyl Orthosilicate?

    1 answer

    1. According to the 13th Edition of the chemicals encyclopedia published by the Royal Society of Chemistry, Tetraethyl Orthosilicate is practically insoluble in water and is slowly decomposed by it.  It is miscible with alcohol.

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  6. Product 131903, Tetraethyl orthosilicate  is commonly used as a precursor to prepare xerogel.  What is xerogel?

    1 answer

    1. A xerogel is a solid formed from a gel by drying with unhindered shrinkage.  Xerogel usually retains high porosity and large surfaced area, along with very small pore size.

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  7. 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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  8. Is anything else needed to use Product 131903, Tetraethyl Orthosilicate in a hydrolysis reaction?

    1 answer

    1. An acid or alkali catalyst is needed to do a hydrolysis reaction to free the silanol group for use.

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