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376213

Sigma-Aldrich

Trimethoxy(octadecyl)silane

technical grade

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Synonym(s):
Octadecyltrimethoxysilane
Linear Formula:
CH3(CH2)17Si(OCH3)3
CAS Number:
Molecular Weight:
374.67
Beilstein:
5791830
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

grade

technical grade

Quality Level

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

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This Item
376221104817253006
mp

16-17 °C (lit.)

mp

-

mp

-

mp

-

density

0.883 g/mL at 25 °C (lit.)

density

0.907 g/mL at 25 °C (lit.)

density

0.984 g/mL at 25 °C (lit.)

density

0.756 g/mL at 25 °C (lit.)

grade

technical grade

grade

-

grade

-

grade

-

form

liquid

form

liquid

form

-

form

liquid

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 Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

284.0 °F - closed cup

Flash Point(C)

140 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Customers Also Viewed

Rodrigo Brambilla et al.
Analytical and bioanalytical chemistry, 391(7), 2673-2681 (2008-05-28)
A series of octadecylsilane-modified silicas were prepared by sol-gel and grafting methods. Carbon contents and octadecyl chain conformations were shown to depend on the preparative route. Grafting engenders a low carbon content and a liquid-like chain conformation, while the sol-gel
Kristen S Wilson et al.
Biomaterials, 26(25), 5095-5103 (2005-03-29)
This study was designed to determine the effect of varying the chemistry of the interfacial phase on critical composite properties in dental nanocomposite materials. Silica nanoparticles were silanized with varying ratios of 3-methacryloxypropyltrimethoxysilane (MPTMS) and octyltrimethoxysilane (OTMS) while keeping the
Superhydrophobicity, UV protection and oil/water separation properties of fly ash/Trimethoxy (octadecyl) silane coated cotton fabrics.
Khan MZ, et al.
Carbohydrate Polymers, 202(2-3), 571-580 (2018)
Noncovalent assembly of reduced graphene oxide and alkyl-grafted mesoporous silica: an effective drug carrier for near-infrared light-responsive controlled drug release.
He D, et al.
Journal of Material Chemistry B: Materials for Biology and Medicine, 3(27), 5588-5594 (2015)
Evaluation of magnetic nanoparticles to serve as solid-phase extraction sorbents for the determination of endocrine disruptors in milk samples by gas chromatography mass spectrometry.
Synaridou M, et al.
Journal of Chromatography A, 1348(27), 71-79 (2014)

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