Description

Di-n-Octyldimethoxysilane is a specialized organosilicon compound, specifically a dialkoxysilane, featuring two long-chain n-octyl groups. This molecular structure is critical for its role as a hydrophobic agent and coupling agent, enabling strong interfacial adhesion between organic polymers and inorganic substrates. It is essential for manufacturers in the silicone rubber, sealant, and advanced material composites industries seeking to enhance water repellency, mechanical properties, and long-term stability in their products.

Application

• As a key hydrophobic agent and crosslinking agent in the production of high-performance silicone rubber and RTV (Room Temperature Vulcanizing) sealants.
• As a surface modifying agent for inorganic fillers (e.g., silica, calcium carbonate) to improve their dispersion and compatibility within polymer matrices.
• As a coupling agent in composite materials, enhancing the bond between organic resins and glass or mineral fibers.
• In the formulation of water-repellent coatings for construction materials, textiles, and electronic components.
• As an intermediate in the synthesis of more complex organosilicon molecules and functional silanes for specialized applications.
• For research and development in material science focused on creating novel hybrid organic-inorganic materials.

Basic Information

Product Name	Di-n-Octyldimethoxysilane
CAS No.	947155-81-9
Molecular Formula	C18H40O2Si
Molecular Weight	316.60 g/mol
Synonyms	Dioctyldimethoxysilane; Dimethoxydioctylsilane; n-Octylsilane, dimethoxy-di-n-octyl-; Di-n-octylsilanediol, dimethyl ether; Bis(n-octyl)dimethoxysilane; Dioctyl(dimethoxy)silane; (Dimethoxy)di-n-octylsilane
EINECS	Contact for details

Quality Control

Our Di-n-Octyldimethoxysilane is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay (GC), identity confirmation (IR, NMR), and impurity profiling, to ensure it meets precise specifications for industrial and R&D applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (20°C)	0.86 - 0.88 g/cm³
Refractive Index (n20/D)	1.435 - 1.445

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