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Sigma-Aldrich

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
Beilstein:
5791830
EC Number:
221-339-2
MDL number:
MFCD00043060
UNSPSC Code:
12352103
PubChem Substance ID:
24863428
NACRES:
NA.23

grade

technical grade

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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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

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’.

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Deepa Sriramulu et al.
Scientific reports, 6, 35993-35993 (2016-11-09)
Multifunctional coatings offer many advantages towards protecting various surfaces. Here we apply aggregation induced segregation of perylene diimide (PDI) to control the surface morphology and properties of silica nanoparticles. Differentially functionalized PDI was incorporated on the surface of silica nanoparticles
Zhongbo Li et al.
Journal of chromatography. A, 1218(37), 6232-6239 (2011-07-29)
In this study, core-shell magnetic mesoporous microspheres with C18-functionalized interior pore-walls were synthesized through coating Fe(3)O(4) microspheres with a mesoporous inorganic-organic hybrid layer with a n-octadecyltriethoxysilane (C18TES) and tetraethyl orthosilicate (TEOS) as the silica source and cetyltrimethylammonia bromide (CTAB) as
Tadahiro Yamashita et al.
Biomaterials, 32(10), 2459-2465 (2011-01-22)
Various micro cell culture systems have recently been developed. However, it is extremely difficult to recover cultured cells from a microchannel because the upper and lower substrates of a microchip are permanently combined. Therefore, we developed a cell culture and
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)
Koji Mitamura et al.
The journal of physical chemistry. B, 111(30), 8891-8898 (2007-07-13)
Hydrophobic gold nanorods were fabricated from hydrophilic gold nanorods coated with hexadecyltrimethylammonium bromide by treating with mercaptopropyltrimethoxysilane (MPS) and subsequently octadecyltrimethoxysilane (ODS). The fabrication of the hydrophobic shell went through the process of (1) binding MPS onto the nanorods, (2)
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