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Sigma-Aldrich

Ethoxytrimethylsilane

98%

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Synonym(s):
Trimethylethoxysilane
Linear Formula:
C2H5OSi(CH3)3
CAS Number:
Molecular Weight:
118.25
Beilstein/REAXYS Number:
1731950
EC Number:
MDL number:
UNSPSC Code:
12352103
PubChem Substance ID:
NACRES:
NA.23

Quality Level

assay

98%

form

liquid

refractive index

n20/D 1.374 (lit.)

bp

75-76 °C (lit.)

density

0.757 g/mL at 25 °C (lit.)

SMILES string

CCO[Si](C)(C)C

InChI

1S/C5H14OSi/c1-5-6-7(2,3)4/h5H2,1-4H3

InChI key

RSIHJDGMBDPTIM-UHFFFAOYSA-N

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General description

Ethoxytrimethylsilane (ETMS) is an alkoxysilane that is used as a capping agent, which can tune the hydrophobic properties for a variety of substrates by coupling with the surface hydroxyl groups.
Sodium acetylacetonate reacts with dichloro trimethylsiloxyaluminium to form ethoxytrimethylsilane.{70} Ethoxytrimethylsilane reacts with alkali ions to form Si-O-M (M: alkali metal) linkage, which was investigated in detail by 29Si NMR.1

Application

ETMS can be used to modify the silica nanoparticles to form a hydrophobic coating with ultra-high molecular weight polyethylene on the surface of the steel. It may be used to methylate silica nanoparticles that form silica nano-capsules for stabilized oil-in water emulsions.

pictograms

Flame

signalword

Danger

hcodes

Hazard Classifications

Flam. Liq. 2

wgk_germany

WGK 3

ppe

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


Certificates of Analysis (COA)

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Hydrophilic and hydrophobic modifications of colloidal silica particles for Pickering emulsions.
Bjorkegren S, et al.
Journal of Colloid and Interface Science, 487, 250-257 (2017)
29Si NMR of ethoxytrimethylsilane hydrolysis and sodium ion exchange.
Suda S, et al.
Journal of Non-Crystalline Solids, 176(1), 26-32 (1994)
Alkylation of isobutane/1-butene on methyl-modified Nafion/SBA-15 materials.
Shen W, et al.
Applied Catalysis A: General, 377(1), 1-8 (2010)
Silica nanoparticles catalyse the formation of silica nanocapsules in a surfactant-free emulsion system.
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Journal of Material Chemistry A, 3(48), 24428-24436 (2015)
Fabrication of robust and scalable superhydrophobic surfaces and investigation of their anti-icing properties.
Wang N, et al.
Materials & Design, 156(1-2), 320-328 (2018)

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