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376213

Trimethoxy(octadecyl)silane

technical grade

Synonym(s):

Octadecyltrimethoxysilane

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About This Item

Linear Formula:
CH3(CH2)17Si(OCH3)3
CAS Number:
3069-42-9
Molecular Weight:
374.67
UNSPSC Code:
12352103
NACRES:
NA.23
PubChem Substance ID:
24863428
EC Number:
221-339-2
Beilstein/REAXYS Number:
5791830
MDL number:
MFCD00043060
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grade

technical grade

Quality Segment

100

form

liquid

refractive index

n20/D 1.439 (lit.)

mp

16-17 °C (lit.)

density

0.883 g/mL at 25 °C (lit.)

SMILES string

CCCCCCCCCCCCCCCCCC[Si](OC)(OC)OC

InChI

1S/C21H46O3Si/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-25(22-2,23-3)24-4/h5-21H2,1-4H3

InChI key

SLYCYWCVSGPDFR-UHFFFAOYSA-N

General description

Trimethoxy(octadecyl)silane (OTMS) is an alkyl silane that functionalizes a variety of nanoparticle surfaces and facilitates a hydrophobic coating with a high-water contact angle and low surface energy.
Trimethoxy(octadecyl)silane (OTS) is an important alkylsilane that can form strong covalent bonds with silicon oxide and serves as a potential lubricant for micro electro mechanical systems (MEMS). OTS is largely used for surface chemical modification, modifying silica resulted in an increased charge carrier mobility for a variety of vacuum deposited and solution cast organic semiconductors.

Application

Magnetic nanoparticles (Fe2O3) can be surface modified with OTMS. It forms a sorbent for the magnetic solid-phase extraction (MSPE) of endocrine disruptors (organochlorine pesticides) from milk samples. It may form a corrosion protective coating on AZ31 magnesium alloy that finds potential application in automotive industry. It may also be used to form a composite with fly ash that can be coated to achieve a superhydrophobic and UV-protected cotton fabric.
OTS is used for the development of self assembled monolayers(SAMs). OTS is also used to modify the silica dielectric surface in organic field effect transistors.

Storage Class

10 - Combustible liquids

wgk

WGK 1

flash_point_f

284.0 °F - closed cup

flash_point_c

140 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

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