Description

1,3-Di-n-Octyl-1,1,3,3-Tetraethoxydisiloxane is a specialized organosilicon compound featuring a disiloxane backbone with long-chain alkyl and alkoxy substituents. This unique structure makes it a valuable hydrophobic modifying agent and coupling agent for enhancing material compatibility and surface properties. It is primarily used by formulators and researchers in the advanced materials, coatings, and specialty polymer industries seeking to impart moisture resistance and improve adhesion.

Application

• Surface Modification Agent: Used to hydrophobically modify inorganic fillers (e.g., silica, glass) for improved dispersion in organic polymer matrices.
• Crosslinking/Coupling Agent: Functions as a precursor or additive in silicone resin synthesis and as an adhesion promoter in hybrid organic-inorganic systems.
• Water-Repellent Coatings: A key intermediate for formulating durable water-repellent and anti-corrosion coatings for metals and construction materials.
• Release Coatings & Molding: Employed in the production of silicone-based release agents and as a component in mold-making materials.
• Specialty Elastomers & Sealants: Imparts specific rheological and hydrophobic properties to high-performance silicone elastomers and sealants.
• Electronics & Encapsulation: Used in the formulation of protective conformal coatings and encapsulation materials for electronic components.

Basic Information

Product Name	1,3-Di-n-Octyl-1,1,3,3-Tetraethoxydisiloxane
CAS No.	26496-09-3
Molecular Formula	C24H54O5Si2
Molecular Weight	478.85 g/mol
Synonyms	Bis(octyl)tetraethoxydisiloxane; 1,3-Dioctyl-1,1,3,3-tetraethoxydisiloxane; Tetraethoxy(octyl)disiloxane; Dioctyltetraethoxydisiloxane; Disiloxane, 1,3-dioctyl-1,1,3,3-tetraethoxy-; Octylsilane, tetraethoxy deriv.; (Octyl)tetraethoxydisiloxane
EINECS	Contact for details

Quality Control

Our production of 1,3-Di-n-Octyl-1,1,3,3-Tetraethoxydisiloxane adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including GC, NMR, and FTIR analysis, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance and regulatory needs.

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); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Density (at 20°C)	0.90 - 0.95 g/mL
Refractive Index (n20D)	1.410 - 1.420

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