Description

Chloromethyltriethoxysilane is a versatile organosilicon compound featuring both a reactive chloromethyl group and hydrolyzable ethoxy groups. This bifunctional nature makes it a crucial coupling agent and intermediate for introducing silicon-based functionality into organic matrices. It is essential for manufacturers in the silicone, polymer, and advanced materials industries seeking to enhance adhesion, modify surfaces, or create specialized hybrid materials. Its applications span from industrial sealants to high-performance coatings and functionalized silica.

Application

• Silane Coupling Agent: Used to improve the adhesion between organic polymers (like epoxies, polyurethanes) and inorganic substrates (glass, metals, minerals).
• Surface Modification: Imparts hydrophobic or specific functional properties to silica, fillers, and nanoparticles for composite materials.
• Intermediate for Specialty Silicones: Serves as a key building block in the synthesis of custom silicone resins, fluids, and cross-linkers with chloromethyl functionality.
• Adhesive & Sealant Formulations: Enhances the moisture-curing properties and adhesion strength of silicone-based sealants and adhesives.
• Fiberglass Treatment: Used as a sizing or finishing agent for glass fibers to improve compatibility with resin systems in reinforced plastics.
• Hybrid Organic-Inorganic Material Synthesis: A precursor in sol-gel processes for creating advanced coatings, membranes, and optical materials.

Basic Information

Product Name	Chloromethyltriethoxysilane
CAS No.	15267-95-5
Molecular Formula	C7H17ClO3Si
Molecular Weight	212.75 g/mol
Synonyms	(Chloromethyl)triethoxysilane; Triethoxy(chloromethyl)silane; Chloromethyltriethoxysilane; Silane, (chloromethyl)triethoxy-; Chloromethyltriethoxysilane; A 163; Dynasylan® 3201; KBM 703; SCA 3201; (Triethoxysilyl)methyl chloride
EINECS	239-300-5

Quality Control

Our Chloromethyltriethoxysilane is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We adhere to relevant industry standards, and each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, identity, and impurity profiles. Our quality management system supports compliance with global regulatory frameworks, including REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (20°C)	1.00 - 1.05 g/cm³
Refractive Index (n20D)	1.410 - 1.420
Chloride Content	16.5 - 17.0 %

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