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Sigma-Aldrich

Tetramethyl orthosilicate

≥99%

Sinónimos:

Tetramethoxysilane

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About This Item

Fórmula lineal:
Si(OCH3)4
Número de CAS:
681-84-5
Peso molecular:
152.22
Beilstein/REAXYS Number:
1699658
EC Number:
211-656-4
MDL number:
MFCD00008341
UNSPSC Code:
12352103
PubChem Substance ID:
24860943
NACRES:
NA.23

vapor density

5.25 (vs air)

Quality Level

200

vapor pressure

13 hPa ( 20 °C)

assay

≥99%

form

liquid

refractive index

n20/D 1.368 (lit.)

bp

121-122 °C (lit.)

mp

−4 °C (lit.)

density

1.023 g/mL at 25 °C (lit.)

SMILES string

CO[Si](OC)(OC)OC

InChI

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

InChI key

LFQCEHFDDXELDD-UHFFFAOYSA-N

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General description

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.

signalword

Danger

Hazard Classifications

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

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

78.8 °F - closed cup

flash_point_c

26 °C - closed cup

ppe

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

Certificados de análisis (COA)

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Tetramethyl orthosilicate as a sharp-selective catalyst of C3-methylation of indole by supercritical methanol
I.V.Kozhevnikov, et al.
Journal of Supercritical Fluids, 69, 82-90 (2012)
Tetramethyl Orthosilicate (TMOS) as a Reagent for Direct Amidation of Carboxylic Acids
D. Christopher Braddock, et al.
Organic Letters, 20, 950-953 (2018)
Preparation of sol-gel hybrid materials from gamma-methacryloxypropyltrimethoxysilane and tetramethyl orthosilicate: study of the hydrolysis and condensation reactions
Amir A, et al.
Colloid and Polymer Science, 289, 1875-1883 (2011)
Fabrication and characteristics of SiOx films by plasma chemical vapor deposition of tetramethylorthosilicate
Mu-Rong Yang, et al.
Surface and Coatings Technology, 123, 204-209 (2000)
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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