Description

Octadecylmethylchlorosilane is a high-purity organosilicon compound, specifically a long-chain alkylchlorosilane, widely used as a key intermediate and surface modifying agent. Its primary value lies in its ability to impart hydrophobic and oleophobic properties to various inorganic and organic substrates, creating stable, covalently bonded monolayers. This product is essential for manufacturers and R&D teams in the advanced materials, specialty chemicals, and life sciences sectors seeking to engineer surface properties for enhanced performance.

Application

• Surface Modification Agent: A critical reagent for the hydrophobic functionalization of silica, glass, metals, and other oxide surfaces.
• Chromatography Stationary Phases: Used in the synthesis of reversed-phase HPLC and GC columns (e.g., C18 phases) to modify silica gel for analytical and preparative separations.
• Nanomaterial Functionalization: Imparts organic compatibility and stability to nanoparticles (e.g., silica, quantum dots) for use in composites and biomedical applications.
• Water-Repellent Coatings: Serves as a precursor in formulations for creating durable water- and stain-resistant coatings on textiles, paper, and construction materials.
• Adhesion Promoter: Enhances the bonding between organic polymers and inorganic fillers or substrates in composite materials.
• Silylating Agent: Used in organic synthesis to introduce the octadecyldimethylsilyl protecting group for alcohols and other sensitive functional groups.
• Release Coatings: A key component in the manufacture of silicone-based release liners for labels and adhesive tapes.
• Research & Development: A valuable building block for synthesizing novel silicone copolymers and dendrimers with tailored properties.

Basic Information

Product Name	Octadecylmethylchlorosilane
CAS No.	124694-97-9
Molecular Formula	C19H41ClSi
Molecular Weight	333.07 g/mol
Synonyms	Chloro(octadecyl)methylsilane; Chlorodimethyloctadecylsilane; Dimethyloctadecylchlorosilane; n-Octadecyldimethylchlorosilane; ODS; ODMCS; Octadecyldimethylchlorosilane; Stearyldimethylchlorosilane; 1-Octadecanol, dimethylchlorosilyl ether
EINECS	Contact for details

Quality Control

Our Octadecylmethylchlorosilane is manufactured under stringent quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and Karl Fischer titration, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment to guarantee compliance with your technical specifications and support your quality assurance protocols.

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) and must be handled under an inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis. Keep away from moisture, strong bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Chloride Content	Conforms

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