Trimethoxy(octadecyl)silane

ALDRICH/376213 - technical grade

Synonym: Octadecyltrimethoxysilane

CAS Number: 3069-42-9
Empirical Formula (Hill Notation): C₂₁H₄₆O₃Si
Molecular Weight: 374.67
EC Number: 221-339-2
MDL Number: MFCD00043060
Linear Formula: CH₃(CH₂)₁₇Si(OCH₃)₃
Product Type: Chemical

Catalog Number	PKG Qty.	Price	Quantity


45-376213-5ML	5 mL	$57.20 1/EA		Add To Favorites
45-376213-25ML	25 mL	$186.00 1/EA		Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

density	0.883 g/mL at 25 °C (lit.)
form	liquid
grade	technical grade
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
mp	16-17 °C (lit.)
Quality Level	100
refractive index	n20/D 1.439 (lit.)
SMILES string	CCCCCCCCCCCCCCCCCC[Si](OC)(OC)OC

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.
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.
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.
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.
Packaging:	25 mL in poly bottle
Packaging:	5 mL in glass bottle

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36
RIDADR	NONH for all modes of transport
WGK Germany	WGK 1
Flash Point(F)	284.0 °F - closed cup
Flash Point(C)	140 °C - closed cup

mp	16-17 °C (lit.)
Density	0.883 g/mL at 25 °C (lit.)
Refractive Index	n20/D 1.439 (lit.)
UNSPSC	12352103

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