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:
Molecular Weight:
374.67
Beilstein:
5791830
EC Number:
MDL number:
UNSPSC Code:
12352103
PubChem Substance ID:
NACRES:
NA.23
Recommended Products
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 (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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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
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.
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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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Journal of Material Chemistry B: Materials for Biology and Medicine, 3(27), 5588-5594 (2015)
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