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341436

Sigma-Aldrich

Tetramethyl orthosilicate

≥99%

Sinônimo(s):

Tetramethoxysilane

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About This Item

Fórmula linear:
Si(OCH3)4
Número CAS:
681-84-5
Peso molecular:
152.22
Beilstein:
1699658
Número CE:
211-656-4
Número MDL:
MFCD00008341
Código UNSPSC:
12352103
ID de substância PubChem:
24860943
NACRES:
NA.23

densidade de vapor

5.25 (vs air)

pressão de vapor

13 hPa ( 20 °C)

Ensaio

≥99%

Formulário

liquid

índice de refração

n20/D 1.368 (lit.)

p.e.

121-122 °C (lit.)

pf

−4 °C (lit.)

densidade

1.023 g/mL at 25 °C (lit.)

cadeia de caracteres SMILES

CO[Si](OC)(OC)OC

InChI

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

chave InChI

LFQCEHFDDXELDD-UHFFFAOYSA-N

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Descrição geral

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.

Aplicação

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.

Palavra indicadora

Danger

Frases de perigo

H226,H315,H318,H330

Classificações de perigo

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

Código de classe de armazenamento

3 - Flammable liquids

Classe de risco de água (WGK)

WGK 1

Ponto de fulgor (°F)

78.8 °F - closed cup

Ponto de fulgor (°C)

26 °C - closed cup

Equipamento de proteção individual

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

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Certificados de análise (COA)

Lot/Batch Number
BCCG3627
BCCD3961
BCCB7181
BCBZ7708
BCBW9961

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Sigma-Aldrich

759414

Tetraetil ortossilicato

Tetrabutyl orthosilicate 97%

Sigma-Aldrich

T5702

Tetrabutyl orthosilicate

Trimethoxymethylsilane 95%

Sigma-Aldrich

440175

Trimethoxymethylsilane

Dimethoxydimethylsilane ≥99.5%, 99.999% metals basis

Sigma-Aldrich

556688

Dimethoxydimethylsilane

Tetrapropyl orthosilicate ≥98%, deposition grade

Sigma-Aldrich

679240

Tetrapropyl orthosilicate

Tetrapropyl orthosilicate 95%

Sigma-Aldrich

235741

Tetrapropyl orthosilicate

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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