Trimethoxy(octyl)silane

CAS 3069-40-7CH3(CH2)7Si(OCH3)3Organometallic Reagents

Octyltrimethoxysilane (CAS: 3069-40-7) is an organosilicon compound with the chemical formula CH3(CH2)7Si(OCH3)3. This trialkoxysilane features an eight-carbon alkyl chain, lending it hydrophobic properties. It is widely employed in materials science and chemical synthesis for surface modification, acting as a coupling agent or precursor for silane-based materials and nanostructures, contributing to enhanced adhesion and water repellency.

IUPAC: Octyltrimethoxysilane

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Trimethoxy(octyl)silane (CH3(CH2)7Si(OCH3)3) — chemical structure, CAS 3069-40-7; Chemistry, fine chemical supplied by Tech Serve Solutions

Chemical SynthesisMaterials ScienceMicro/NanoElectronicsNanomaterialsOrganometallic ReagentsOrganosiliconRSi(OR″)3Self-Assembly MaterialsSilanesTrialkoxysilanes More...

01 /Applications

Surface Modification

Octyltrimethoxysilane is used to impart hydrophobicity to various surfaces, such as glass, silica, and metal oxides. It forms a stable, non-polar layer through hydrolysis and condensation, altering surface energy and wettability.

Precursor for Materials Synthesis

It serves as a building block in the synthesis of organosilicon polymers and hybrid organic-inorganic materials. Its structure allows for incorporation into siloxane networks, influencing the final material's properties.

Self-Assembly and Nanotechnology

The compound is utilised in self-assembly processes for creating ordered molecular layers and functionalised nanomaterials. Its amphiphilic nature can be leveraged in the fabrication of nanostructured surfaces and devices.

Coupling Agent

As a coupling agent, it can enhance the compatibility and adhesion between organic polymers and inorganic fillers or substrates. This improves the mechanical and physical properties of composite materials.

02 /Properties

Molecular weight	234.41
Linear formula	CH3(CH2)7Si(OCH3)3
Assay	96%
Density	0.907 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.416(lit.)

03 /Safety & handling

Protective equipment	Eyeshields, Gloves
Flash point	102 °C / 215.6 °F
Water hazard class (WGK, DE)	1

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

04 /Identifiers & registry

CAS number

3069-40-7

MDL number

MFCD00043053

PubChem substance

24863429

Beilstein registry

1926957

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 Octyltrimethoxysilane used for?

Octyltrimethoxysilane is primarily used for surface modification to impart hydrophobicity, as a precursor in the synthesis of organosilicon materials and nanostructures, and as a coupling agent to improve adhesion between organic and inorganic components.

What are the CAS number and formula for Octyltrimethoxysilane?

The CAS number is 3069-40-7, and its chemical formula is CH3(CH2)7Si(OCH3)3.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Octyltrimethoxysilane with a minimum purity of 96%. We do not represent this product as USP, BP, EP, or any other pharmacopoeial grade.

What are the safety considerations when handling Octyltrimethoxysilane?

Octyltrimethoxysilane is combustible with a flash point of 102 °C (215.6 °F). Appropriate personal protective equipment, including eyeshields and gloves, should be worn during handling. Refer to the Safety Data Sheet for comprehensive hazard information.

How is Octyltrimethoxysilane typically packed and shipped?

Octyltrimethoxysilane is available from Tech Serve Solutions for export, supplied in appropriate packaging suitable for chemical reagents.

How can I request a quote or sample of Octyltrimethoxysilane?

To request a quote or a sample of Octyltrimethoxysilane, please contact our sales team through the website or direct email, referencing the product name and CAS number.