Description

1,8-Bis(Trimethoxysily)Octane is a bifunctional organosilane coupling agent featuring a long-chain alkylene bridge. This compound is valued for its ability to create durable covalent bonds between inorganic substrates and organic polymers, significantly enhancing composite material performance. It is essential for manufacturers in the advanced materials, coatings, and adhesive industries seeking to improve mechanical strength, adhesion, and environmental resistance in their products.

Application

• As a coupling agent and crosslinker in silica-filled rubber compounds (e.g., tires, seals) to improve reinforcement and reduce hysteresis.
• As a surface modifier for glass, minerals, and metal oxides to enhance the compatibility and dispersion of fillers in polymer matrices.
• In the formulation of moisture-curable adhesives, sealants, and coatings (RTV silicones, polyurethanes) to provide improved adhesion to diverse substrates.
• For the silylation of surfaces in chromatography and sensor technology to create specific surface functionalities.
• As a key intermediate in the synthesis of specialty silicone polymers and hybrid organic-inorganic materials.
• In the production of fiber-reinforced composites to promote interfacial bonding between glass or carbon fibers and the resin.

Basic Information

Product Name	1,8-Bis(Trimethoxysily)Octane
CAS No.	105566-68-5
Molecular Formula	C14H34O6Si2
Molecular Weight	354.60 g/mol
Synonyms	Octane-1,8-diylbis(trimethoxysilane); 1,8-Octanediylbis(trimethoxysilane); Bis(trimethoxysilyl)octane; 1,8-Bis(trimethoxysilyl)octane; SIB1834.0 (Gelest); Dynasylan 1189 (Evonik); Silane A-1189; OTS; Octamethylene di(trimethoxysilane)
EINECS	Contact for details

Quality Control

Our 1,8-Bis(Trimethoxysily)Octane is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity, correct identity, and compliance with agreed specifications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20/D)	1.415 - 1.425
Density (20°C)	0.98 - 1.02 g/mL

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