Description

Octadecyldiethoxychlorosilane, Tech-95 is a high-purity organosilicon compound primarily used as a surface modifying agent. This long-chain alkylchlorosilane is valued for its ability to impart durable hydrophobic and oleophobic properties to inorganic substrates. It is essential for manufacturers in the advanced materials, coatings, and electronics industries seeking to modify surface energy and enhance material compatibility.

Application

• Surface Modification of Silica and Glass: As a key coupling agent to create hydrophobic, low-surface-energy coatings on fillers, fibers, and glass surfaces.
• Hydrophobic Agent for Minerals and Pigments: Used to treat inorganic powders like TiO2, CaCO3, and talc to improve dispersion in organic polymer matrices and enhance composite material performance.
• Intermediate for Specialty Silicones: Serves as a crucial building block in the synthesis of custom silicone oils, resins, and other functional organosilicon polymers.
• Water-Repellent Coatings: Formulated into coatings for construction materials, textiles, and paper to provide durable water and stain resistance.
• Adhesion Promoter: Enhances the bonding between organic polymers and inorganic surfaces in sealants, adhesives, and composite materials.
• Nanomaterial Functionalization: Used to modify the surface of nanoparticles (e.g., silica, metal oxides) for controlled dispersion and specific reactivity in advanced nanotechnology applications.

Basic Information

Product Name	Octadecyldiethoxychlorosilane, Tech-95
CAS No.	33734-79-1
Molecular Formula	C22H47ClO2Si
Molecular Weight	407.16 g/mol
Synonyms	Chlorodietoxyoctadecylsilane; Octadecyldiethoxychlorosilane; n-Octadecyldiethoxychlorosilane; Dioctadecyldiethoxysilane (common misnomer, verify context); C18 Silane; Stearyldiethoxychlorosilane; Silane, chlorodietoxyoctadecyl-; 1-Octadecanol, 18-(chlorodietoxysilyl)-
EINECS	Contact for details

Quality Control

Our Octadecyldiethoxychlorosilane, Tech-95 is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets the declared 95% minimum purity and consistent performance specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment to guarantee traceability and compliance.

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 under a dry inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis and degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Chlorine Content	8.5 - 9.2 %
Density (25°C)	0.88 - 0.92 g/mL
Refractive Index (n20/D)	1.440 - 1.450

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