Description

n-Octylmethyldimethoxysilane is a versatile organosilicon compound, specifically a dialkoxysilane, that serves as a key coupling agent and surface modifier. Its value lies in its ability to form stable bonds between inorganic substrates and organic polymers, enhancing material compatibility and performance. This product is essential for manufacturers in the adhesives, sealants, coatings, and composite materials industries seeking to improve adhesion, hydrophobicity, and mechanical properties.

Application

• As a coupling agent in mineral-filled composites (e.g., silica, clay) to improve filler dispersion and interfacial strength.
• As a surface treatment agent for glass fibers, minerals, and metals to impart water repellency and enhance adhesion to polymer matrices.
• In the formulation of moisture-curable adhesives and sealants, where it acts as a crosslinker and adhesion promoter.
• As a key intermediate in the synthesis of more complex silane-modified polymers (SMPs) and resins.
• For the hydrophobic modification of surfaces in construction materials and protective coatings.
• In the production of release coatings and as a processing aid in various polymer applications.

Basic Information

Product Name	n-Octylmethyldimethoxysilane
CAS No.	85712-15-8
Molecular Formula	C₁₁H₂₆O₂Si
Molecular Weight	218.41 g/mol
Synonyms	Methyl-n-octyldimethoxysilane; Dimethoxy(methyl)octylsilane; Octylmethyldimethoxysilane; n-Octyl(methyl)dimethoxysilane; (Dimethoxymethylsilyl)octane; Methyloctyldimethoxysilane; CAS 85712-15-8
EINECS	Contact for details

Quality Control

Our n-Octylmethyldimethoxysilane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC), to ensure high purity and consistent performance. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical properties is provided with every shipment to guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and degradation upon contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.415 - 1.425
Density (g/mL, 20°C)	0.87 - 0.89

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.