254371

Ethoxytrimethylsilane

98%

• Synonym(s): Trimethylethoxysilane
• Linear Formula: C₂H₅OSi(CH₃)₃
• CAS Number: 1825-62-3
• Molecular Weight: 118.25
• Beilstein/REAXYS Number: 1731950
• EC Number: 217-370-6
• MDL number: MFCD00009069
• UNSPSC Code: 12352103
• PubChem Substance ID: 24855380
• NACRES: NA.23

Properties

• 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

Description

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.

Safety Information

• pictograms: GHS02
• signalword: Danger
• hcodes: H225
• pcodes: P210 - P233 - P240 - P241 - P242 - P243
• Hazard Classifications: Flam. Liq. 2
• Storage Class: 3 - Flammable liquids
• wgk_germany: 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