Description

Chloromethyltrimethoxysilane is a versatile organosilicon compound that serves as a critical bifunctional building block in advanced material synthesis. Its unique structure, featuring both a reactive chloromethyl group and hydrolyzable methoxysilyl groups, enables it to act as a coupling agent and a precursor for functional siloxanes. This product is essential for manufacturers in the silicone, polymer, and specialty chemical industries seeking to introduce specific functionalities or improve material compatibility. Its applications are pivotal in creating high-performance coatings, adhesives, and composite materials.

Application

• Surface Modification Agent: Used to treat inorganic fillers (e.g., silica, glass fibers) to enhance their compatibility and dispersion within polymer matrices like epoxies and polyurethanes.
• Silicone Intermediate: Acts as a key monomer for synthesizing specialty silicone resins and fluids with chloromethyl functionality for further chemical modification.
• Adhesive & Sealant Formulation: Incorporated as an adhesion promoter to improve the bond strength of sealants and adhesives to various substrates, including metals and glass.
• Crosslinking Agent: Utilized in the production of crosslinked polymer networks, contributing to improved thermal and mechanical properties in cured products.
• Precursor for Functional Silanes: Serves as a starting material for the synthesis of other organofunctional silanes through nucleophilic substitution of the chloromethyl group.
• Water Repellent Treatments: Applied in formulations for creating water-repellent surfaces on construction materials like concrete and stone.

Basic Information

Product Name	Chloromethyltrimethoxysilane
CAS No.	5926-26-1
Molecular Formula	C4H11ClO3Si
Molecular Weight	170.67 g/mol
Synonyms	(Chloromethyl)trimethoxysilane; Trimethoxy(chloromethyl)silane; Silane, (chloromethyl)trimethoxy-; Chloromethyl-trimethoxysilan; NSC 93766; (Chlorométhyl)triméthoxysilane; ClCH2Si(OCH3)3
EINECS	227-666-3

Quality Control

Our Chloromethyltrimethoxysilane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your technical requirements.

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). Due to its moisture-sensitive (hygroscopic) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain product integrity. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 97.0%
Density (20°C)	1.17 - 1.19 g/cm³
Refractive Index (n20D)	1.410 - 1.415

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