Description

Octadecyl Diisopropyl Chlorosilane is a high-purity organosilicon reagent, specifically a chlorosilane derivative, widely used as a key intermediate and surface modifying agent. Its primary value lies in its ability to introduce long-chain hydrophobic octadecyl groups onto various substrates, significantly altering surface properties for enhanced performance. This compound is essential for manufacturers and R&D teams in the advanced materials, pharmaceuticals, and specialty chemical sectors seeking to develop products with tailored surface characteristics.

Application

• Surface Modification of Silica and Other Oxides: Used as a silylating agent to functionalize chromatographic silica gel, nanoparticles, and fillers to create reversed-phase materials for HPLC and other separation techniques.
• Hydrophobic Coatings: Serves as a precursor for creating water-repellent and anti-fouling coatings on glass, metals, and ceramics.
• Polymer Functionalization: Employed to graft hydrophobic alkyl chains onto polymer backbones, modifying solubility, compatibility, and thermal properties.
• Adhesion Promotion: Acts as a coupling agent to improve the bond between organic polymers and inorganic surfaces in composite materials.
• Intermediate for Specialty Silicones: A crucial building block in the synthesis of custom silicone oils, resins, and elastomers with specific long-chain alkyl functionalities.
• Nanomaterial Synthesis: Used to cap and stabilize metal oxide nanoparticles, controlling their dispersion and preventing aggregation in non-polar media.

Basic Information

Product Name	Octadecyl Diisopropyl Chlorosilane
CAS No.	162578-85-0
Molecular Formula	C24H51ClSi
Molecular Weight	403.21 g/mol
Synonyms	Chloro(diisopropyl)octadecylsilane; Diisopropyloctadecylchlorosilane; n-Octadecyldiisopropylchlorosilane; Octadecyldiisopropylsilyl chloride; Stearyldiisopropylchlorosilane; (Diisopropyl)(octadecyl)chlorosilane; C18 Silane Reagent; Long-chain alkylchlorosilane
EINECS	Contact for details

Quality Control

Our Octadecyl Diisopropyl Chlorosilane is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for research and industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its moisture-sensitive (hygroscopic) nature, containers must be kept sealed under an inert atmosphere (argon or nitrogen) when not in use. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or NMR)	≥ 97.0%
Chloride Content	Theoretical
Density (at 20°C)	~0.86 g/mL
Refractive Index (n20D)	~1.455

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