Diethoxymethyloctadecylsilane

CAS 67859-75-0CH3(CH2)17Si(OC2H5)2CH3Chemical Synthesis

Diethoxymethyloctadecylsilane (CAS: 67859-75-0), with the molecular formula CH3(CH2)17Si(OC2H5)2CH3 and a molecular weight of 386.73 g/mol, is an organosilicon compound. This liquid reagent is primarily utilised in materials science and chemical synthesis. Its properties lend themselves to applications in surface modification and the development of self-assembled monolayers, particularly in microelectronics and nanotechnology.

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Diethoxymethyloctadecylsilane (CH3(CH2)17Si(OC2H5)2CH3) — chemical structure, CAS 67859-75-0; Chemistry, fine chemical supplied by Tech Serve Solutions

Chemical SynthesisMaterials ScienceMicro/NanoElectronicsOrganometallic ReagentsOrganosiliconOthersSelf-Assembly MaterialsSilanes More...

01 /Applications

Surface Modification

Diethoxymethyloctadecylsilane can be employed to create hydrophobic surfaces by forming self-assembled monolayers on various substrates. This is crucial for controlling surface energy and adhesion in microelectronic fabrication.

Materials Science

It serves as a valuable building block in materials science for developing functionalised surfaces and novel materials with tailored properties. Its long alkyl chain influences surface characteristics significantly.

Chemical Synthesis

As an organosilicon reagent, it is used in organic synthesis to introduce specific functional groups or to modify existing molecules, contributing to the creation of complex chemical structures.

Micro/Nanoelectronics

The compound finds application in the microelectronics industry for applications such as creating passivation layers or modifying electrode surfaces in semiconductor devices and sensors.

02 /Properties

Molecular weight	386.73
Linear formula	CH3(CH2)17Si(OC2H5)2CH3
Form	liquid
Boiling point	197 °C/2 mmHg(lit.)
Density	0.849 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.444(lit.)

03 /Safety & handling

GHS hazard pictogram: Harmful / irritant (GHS07) — Harmful / irritant

Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust, fume, gas or vapours
P305IF IN EYES

Protective equipment	Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
Flash point	113 °C / 235.4 °F
Water hazard class (WGK, DE)	3
Hazard codes (EU)	Xi
Risk statements (R)	36/37/38
Safety statements (S)	26-36

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

67859-75-0

MDL number

MFCD00026674

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Diethoxymethyloctadecylsilane used for?

Diethoxymethyloctadecylsilane is used in materials science, chemical synthesis, surface modification, and micro/nanoelectronics to create hydrophobic surfaces and functionalise materials.

What is the CAS number and chemical formula for Diethoxymethyloctadecylsilane?

The CAS number is 67859-75-0, and the chemical formula is CH3(CH2)17Si(OC2H5)2CH3.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Diethoxymethyloctadecylsilane at a purity indicated by its refractive index (n20/D 1.444) and density (0.849 g/mL at 25 °C). We do not represent this product as USP, BP, EP, or other pharmacopoeia grades.

What are the safety and handling precautions for Diethoxymethyloctadecylsilane?

Diethoxymethyloctadecylsilane is classified as a Warning substance. It may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Use appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator. Avoid breathing vapours.

How is Diethoxymethyloctadecylsilane packed and shipped?

Diethoxymethyloctadecylsilane is available as a liquid and is packed and shipped according to standard chemical handling and export regulations.

How can I request a sample or quote for Diethoxymethyloctadecylsilane?

To request a sample or a quote, please contact our sales department through the Tech Serve Solutions website, providing your details and the product CAS number 67859-75-0.