Description

3-Chloropropyldimethylmethoxysilane is a versatile organosilicon compound that serves as a critical coupling agent and intermediate in advanced material synthesis. Its bifunctional structure, featuring both a reactive chloropropyl group and a hydrolyzable methoxysilyl group, enables it to form durable bonds between organic polymers and inorganic surfaces. This product is essential for manufacturers in the silicone, adhesive, and composite industries seeking to enhance material properties such as adhesion, dispersion, and water resistance. Its utility extends to creating specialized surface treatments and functionalized polymers for high-performance applications.

Application

• Silicone Rubber Modification: Acts as a crosslinking agent or chain extender to improve the mechanical properties and thermal stability of silicone elastomers.
• Surface Priming & Adhesion Promotion: Used as a primer or additive in coatings, sealants, and adhesives to dramatically improve bond strength to glass, metals, and mineral substrates.
• Filler Treatment in Composites: Functionalizes silica, clay, and other inorganic fillers to enhance their compatibility and dispersion within plastic and rubber matrices, leading to stronger, more uniform composites.
• Fiberglass Sizing: A key component in sizing formulations for fiberglass, protecting filaments and promoting adhesion between the glass fibers and the resin in reinforced plastics.
• Synthesis of Specialty Silanes: Serves as a fundamental building block for the synthesis of more complex, custom organofunctional silanes used in niche applications.
• Hydrophobic Surface Treatments: Imparts water-repellent characteristics to surfaces of construction materials, textiles, and electronic components.

Basic Information

Product Name	3-Chloropropyldimethylmethoxysilane
CAS No.	18171-14-7
Molecular Formula	C6H15ClOSi
Molecular Weight	166.72 g/mol
Synonyms	(3-Chloropropyl)dimethylmethoxysilane; Dimethyl(3-chloropropyl)methoxysilane; Methoxy(3-chloropropyl)dimethylsilane; 3-Chloropropyldimethylmethoxysilane; Chloropropyldimethylmethoxysilane; (3-Chloropropyl)methoxydimethylsilane; Silane, (3-chloropropyl)dimethylmethoxy-; A 173 (Silane coupling agent)
EINECS	242-066-2

Quality Control

Our production of 3-Chloropropyldimethylmethoxysilane adheres to a stringent quality management system to ensure batch-to-batch consistency and reliability. Every lot is analyzed against comprehensive specifications using advanced techniques like GC and NMR. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting purity, identity, and key physical parameters. We are committed to meeting the exacting standards required for industrial and research applications.

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 hygroscopic and highly volatile nature, containers must be kept tightly sealed when not in use to prevent moisture absorption and evaporation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.98 - 1.00 g/mL
Refractive Index (n20D)	1.425 - 1.435
Chlorine Content	20.5 - 21.5 %

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