254371
Ethoxytrimethylsilane
98%
Synonym(s):
Trimethylethoxysilane
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About This Item
Linear Formula:
C2H5OSi(CH3)3
CAS Number:
Molecular Weight:
118.25
UNSPSC Code:
12352103
NACRES:
NA.23
PubChem Substance ID:
EC Number:
217-370-6
Beilstein/REAXYS Number:
1731950
MDL number:
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
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.
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Danger
hcodes
Hazard Classifications
Flam. Liq. 2
Storage Class
3 - Flammable liquids
wgk
WGK 3
flash_point_f
-3.1 °F - closed cup
flash_point_c
-19.5 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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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)
29Si NMR of ethoxytrimethylsilane hydrolysis and sodium ion exchange.
Suda S, et al.
Journal of Non-Crystalline Solids, 176(1), 26-32 (1994)
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)