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376213

Sigma-Aldrich

Trimethoxy(octadecyl)silane

technical grade

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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General description

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.
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.

Application

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.
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.

Packaging

5 mL in glass bottle
25 mL in poly bottle

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

Certificate of Analysis

Certificate of Origin

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)...
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)
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)
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)
Sun Hong Kim et al.
ACS nano, 13(6), 6531-6539 (2019-05-11)
Both self-healable conductors and stretchable conductors have been previously reported. However, it is still difficult to simultaneously achieve high stretchability, high conductivity, and self-healability. Here, we observed an intriguing phenomenon, termed "electrical self-boosting", which enables reconstructing of electrically percolative pathways...

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