Merck
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254371

Sigma-Aldrich

Ethoxytrimethylsilane

98%

Synonym(s):
Trimethylethoxysilane
Linear Formula:
C2H5OSi(CH3)3
CAS Number:
Molecular Weight:
118.25
Beilstein:
1731950
EC Number:
MDL number:
PubChem Substance ID:

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

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
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.

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.

Packaging

25, 100 g in glass bottle

Pictograms

FlameExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

-0.4 °F - closed cup

Flash Point(C)

-18 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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)
Silica nanoparticles catalyse the formation of silica nanocapsules in a surfactant-free emulsion system.
Zhao Y, et al.
Journal of Material Chemistry A, 3(48), 24428-24436 (2015)
Alkylation of isobutane/1-butene on methyl-modified Nafion/SBA-15 materials.
Shen W, et al.
Applied Catalysis A: General, 377(1-2), 1-8 (2010)
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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