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Tetraethyl orthosilicate

reagent grade, 98%

Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethyl silicate, Tetraethoxysilane, Tetraethoxysilicon(IV)
Fórmula linear:
Número CAS:
Peso molecular:
Número EC:
Número MDL:
ID de substância PubChem:

Nível de qualidade



reagent grade

densidade de vapor

7.2 (vs air)

pressão de vapor

<1 mmHg ( 20 °C)





índice de refração

n20/D 1.382 (lit.)


168 °C (lit.)


0.933 g/mL at 20 °C (lit.)

SMILES string




InChI key


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1, 2.5, 4 L in glass bottle
25, 250, 500 mL in glass bottle


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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Classificações de perigo

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


Respiratory system

Código de classe de armazenamento

3 - Flammable liquids



Ponto de fulgor (ºF)

113.0 °F - closed cup

Ponto de fulgor (ºC)

45 °C - closed cup

Equipamento de proteção individual

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

Certificado de análise

Insira o número de lote para pesquisar o Certificado de análise (COA).

Certificado de origem

Insira o número de lote para pesquisar o Certificado de origem (COO).

  1. 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.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

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

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

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

    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.

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

    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. 

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

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

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

    The freezing point is ~85°C.

  8. 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.

  9. 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. 

  10. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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Bio-Inspired “Green” Synthesis of Nanomaterials and their Applications

Silica is a very popular inorganic nanomaterial used in a wide range of applications including fillers for rubber, catalyst supports, separation media, carriers in food and agriculture, and abrasive/anticaking agents in cosmetics. It is also widely believed to be an important material for biomedical applications for following reasons.

Vistas in Current Magnetic Materials Research

Magnetism and magnetic materials have been of scientific interest for over 1,000 years. More recently, fundamental investigations have focused on exploring the various types of magnetic materials and understanding the magnetic effects created by electric currents.

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

Hybrid organic-inorganic sol-gel materials containing silica were first called “ORMOSILs” in 1984.

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.

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