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679259

Sigma-Aldrich

Tetramethyl orthosilicate

deposition grade, ≥98%, ≥99.9% trace metals basis

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Synonym(s):
Tetramethoxysilane
Linear Formula:
Si(OCH3)4
CAS Number:
681-84-5
Molecular Weight:
152.22
Beilstein:
1699658
EC Number:
211-656-4
MDL number:
MFCD00008341
UNSPSC Code:
12352300
PubChem Substance ID:
24885480
NACRES:
NA.23

grade

deposition grade

vapor density

5.25 (vs air)

vapor pressure

13 hPa ( 20 °C)

Assay

≥98%
≥99.9% trace metals basis

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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Application

Used in the sol-gel synthesis of chromium-doped silicates and in the formation of hexagonal mesoporous silica layers.

Signal Word

Danger

Hazard Statements

H226,H315,H318,H330

Hazard Classifications

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

WGK

WGK 1

Flash Point(F)

closed cup

Flash Point(C)

closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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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.
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)
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
Carmen Carrasquilla et al.
Journal of the American Chemical Society, 134(26), 10998-11005 (2012-06-26)
Structure-switching, fluorescence-signaling DNA and RNA aptamers have been reported as highly versatile molecular recognition elements for biosensor development. While structure-switching DNA aptamers have been utilized for solid-phase sensing, equivalent RNA aptamers have yet to be successfully utilized in solid-phase sensors
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
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