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341436

Sigma-Aldrich

Tetramethyl orthosilicate

≥99%

Synonyme(s) :

Tetramethoxysilane

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About This Item

Formule linéaire :
Si(OCH3)4
Numéro CAS:
681-84-5
Poids moléculaire :
152.22
Numéro Beilstein :
1699658
Numéro CE :
211-656-4
Numéro MDL:
MFCD00008341
Code UNSPSC :
12352300
ID de substance PubChem :
24860943
Nomenclature NACRES :
NA.23

Densité de vapeur

5.25 (vs air)

Niveau de qualité

200

Pression de vapeur

13 hPa ( 20 °C)

Pureté

≥99%

Forme

liquid

Indice de réfraction

n20/D 1.368 (lit.)

Point d'ébullition

121-122 °C (lit.)

Pf

−4 °C (lit.)

Densité

1.023 g/mL at 25 °C (lit.)

Chaîne SMILES 

CO[Si](OC)(OC)OC

InChI

1S/C4H12O4Si/c1-5-9(6-2,7-3)8-4/h1-4H3

Clé InChI

LFQCEHFDDXELDD-UHFFFAOYSA-N

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Catégories apparentées

Description générale

Tetramethyl orthosilicate is a colorless organosilicon compound consisting of four methoxy groups bonded to a silicon atom. On hydrolysis, it produces silicon dioxide and methanol. It has been widely used in catalysis, synthesis of nanomaterials, ceramics, zeolites, and coating materials.

Application

Tetramethyl orthosilicate can be used:
  • As a precursor to synthesize organic-inorganic coating materials by sol-gel processing method.
  • As an efficient reagent for direct amidation of aliphatic and aromatic carboxylic acids with amines and anilines.
  • As a precursor to fabricate SiO2 nanocomposite films by chemical vapor deposition(CVD) method.
  • As a selective catalyst ofC3-methylation of indole.
Used in the sol-gel synthesis of chromium-doped silicates and in the formation of hexagonal mesoporous silica layers.

Pictogrammes

FlameCorrosionSkull and crossbones
GHS02,GHS05,GHS06

Mention d'avertissement

Danger

Mentions de danger

H226 - H315 - H318 - H330

Classification des risques

Acute Tox. 1 Inhalation - Eye Dam. 1 - Flam. Liq. 3 - Skin Irrit. 2

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 1

Point d'éclair (°F)

78.8 °F - closed cup

Point d'éclair (°C)

26 °C - closed cup

Équipement de protection individuelle

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

Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

Tetramethyl Orthosilicate (TMOS) as a Reagent for Direct Amidation of Carboxylic Acids
D. Christopher Braddock, et al.
Organic Letters, 20, 950-953 (2018)
Yun Tian et al.
Electrophoresis, 29(4), 960-970 (2008-01-24)
A novel calix[4] open-chain crown ether (p-tert-butylcalix[4]arene-1,3-bis(allyloxyethy) ether)-modified, organic-inorganic hybrid silica-based monolithic column possessing vinyl ligands for CEC is described. The monolithic silica matrix containing a vinyl functionality was synthesized by in situ cocondensation of tetramethoxysilane (TMOS) and vinyltrimethoxysilane (VTMS)
Yonghao Xiu et al.
Journal of colloid and interface science, 326(2), 465-470 (2008-07-29)
A method for the preparation of inorganic superhydrophobic silica coatings using sol-gel processing with tetramethoxysilane and isobutyltrimethoxysilane as precursors is described. Incorporation of isobutyltrimethoxysilane into silica layers resulted in the existence of hydrophobic isobutyl surface groups, thereby generating surface hydrophobicity.
Josef Planeta et al.
Journal of chromatography. A, 1217(36), 5737-5740 (2010-08-03)
The temperature effects during the sol-gel process and ageing of the silica-based monolith on the structure and separation efficiency of the capillary columns (100microm i.d., 150mm) for HPLC separations were studied. The tested columns were synthesized from a mixture of
Yan Fang et al.
Journal of chromatography. A, 1217(41), 6405-6412 (2010-09-03)
A simple capillary flow porometer (CFP) was assembled for through-pore structure characterization of monolithic capillary liquid chromatography columns in their original chromatographic forms. Determination of differential pressures and flow rates through dry and wet short capillary segments provided necessary information
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