Skip to Content
Merck
All Photos(1)

Key Documents

254371

Sigma-Aldrich

Ethoxytrimethylsilane

98%

Synonym(s):

Trimethylethoxysilane

Sign Into View Organizational & Contract Pricing


About This Item

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

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

Looking for similar products? Visit Product Comparison Guide

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

Signal Word

Danger

Hazard Statements

Hazard Classifications

Flam. Liq. 2

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

-3.1 °F - closed cup

Flash Point(C)

-19.5 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Electron Moments and Structures of Organosilicon Compounds. III. The Oxygen-Silicon Bond1, 2.
Freiser H, et al.
Journal of the American Chemical Society, 75(12), 2824-2827 (1953)
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)
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(1-2), 1-8 (2010)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service