Description

3-Chloroisobutyldimethylmethoxysilane is a specialized organosilicon compound that serves as a versatile intermediate and coupling agent. Its unique bifunctional structure, featuring both a reactive chloroisobutyl group and a hydrolyzable methoxysilyl group, makes it a critical component for modifying material surfaces and creating covalent bonds between organic and inorganic phases. This chemical is essential for manufacturers in the silicone polymer, advanced materials, and specialty chemical industries seeking to enhance adhesion, compatibility, and performance in their formulations.

Application

• As a key coupling agent in the production of filled polymers and composites to improve the interfacial adhesion between inorganic fillers (e.g., silica, glass fibers) and organic polymer matrices.
• As a surface modifying agent for silica, glass, and metal oxides to impart hydrophobic properties or create reactive sites for further chemical grafting.
• As an intermediate in the synthesis of specialty silicone resins and polymers, where it introduces chloroisobutyl functional groups for subsequent reactions.
• In the formulation of adhesives, sealants, and coatings to enhance bonding strength, moisture resistance, and durability, particularly in challenging environments.
• For the functionalization of nanomaterials (e.g., nanoparticles, nanotubes) to improve their dispersion and compatibility in various host materials.
• In research and development for creating novel hybrid organic-inorganic materials (ORMOSILs) with tailored properties for optical, electronic, or biomedical applications.

Basic Information

Product Name	3-Chloroisobutyldimethylmethoxysilane
CAS No.	18244-08-1
Molecular Formula	C7H17ClOSi
Molecular Weight	180.75 g/mol
Synonyms	Dimethyl(3-chloro-2-methylpropoxy)silane; (3-Chloro-2-methylpropyl)dimethoxymethylsilane; (3-Chloroisobutyl)dimethylmethoxysilane; Methoxy(3-chloro-2-methylpropyl)dimethylsilane; 1-Chloro-3-(dimethylmethoxysilyl)-2-methylpropane; Silane, dimethoxy(3-chloro-2-methylpropyl)methyl-; (3-Chloro-2-methylpropyl)methoxydimethylsilane
EINECS	Contact for details

Quality Control

Every batch of 3-Chloroisobutyldimethylmethoxysilane is produced and tested under a strict quality management system. We employ advanced analytical techniques including Gas Chromatography (GC) and NMR to ensure identity, purity, and consistency meet the high standards required for industrial and R&D applications. Certificates of Analysis (COA) detailing all relevant specifications are provided with each shipment and are available upon request.

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 product is hygroscopic (moisture-sensitive) and highly volatile. Keep away from heat, sparks, open flames, and incompatible materials such as strong acids, bases, and oxidizing agents. Use under an inert atmosphere (e.g., nitrogen or argon) for prolonged storage or handling to minimize degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	0.95 - 0.99 g/mL
Refractive Index (n20D)	1.420 - 1.430
Water Content (KF)	≤ 0.1%

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