Description

Chloromethyl(Methyl)Dimethoxysilane is a bifunctional organosilicon compound featuring both hydrolyzable methoxy groups and a reactive chloromethyl group, enabling versatile coupling and surface modification chemistry. It serves as a critical intermediate for synthesizing specialty silanes used in adhesion promotion, hybrid material design, and functionalized silica surfaces. This compound is essential for manufacturers in silicone polymer synthesis, advanced coatings, semiconductor packaging materials, and high-performance composites requiring precise molecular architecture and interfacial control. Chloromethyl(Methyl)Dimethoxysilane CAS NO 2212-11-5 is widely specified by R&D and production teams seeking reproducible reactivity and batch-to-batch consistency.

Application

• Surface modification of silica nanoparticles and glass fibers to enhance compatibility with organic resins
• Key coupling agent in silicone-modified epoxy and polyurethane systems for improved adhesion and moisture resistance
• Synthesis intermediate for chloromethyl-functionalized silane monomers used in photoresist and dielectric layer formulations
• Building block for dendritic and hyperbranched siloxane architectures in nanocomposite precursors
• Functionalization of metal oxide substrates (e.g., aluminum oxide, titanium dioxide) in catalytic support applications
• Preparation of cationic silane surfactants via quaternization of the chloromethyl group
• Moisture-curable sealant and adhesive formulations where controlled crosslinking kinetics are required
• Surface grafting onto silicon wafers and MEMS devices to introduce reactive handles for bioconjugation or further derivatization

Basic Information

Product Name	Chloromethyl(Methyl)Dimethoxysilane
CAS No.	2212-11-5
Molecular Formula	C3H9ClO2Si
Molecular Weight	140.64 g/mol
Synonyms	Chloromethyl(methyl)dimethoxysilane; (Chloromethyl)(methoxy)dimethoxysilane; (Chloromethyl)(methyl)dimethoxysilane; CMMDMS; Methyl(chloromethyl)dimethoxysilane; Dimethoxy(methyl)chloromethylsilane; 2-(Chloromethyl)-1,1-dimethoxy-1-methylsilane; NSC 77185; UNII-7X1Z1Q7V5N
EINECS	218-639-0

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request. All batches are verified for identity (IR, GC-MS), assay (GC), purity (≥98.5% by GC), and impurity profile (residual solvents, heavy metals per ACS Reagent Grade specifications). Manufacturing adheres to ISO 9001-certified processes and complies with REACH and TSCA regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store under inert atmosphere (nitrogen or argon) at 15–25°C in a dry, well-ventilated area. Due to its hygroscopic nature, minimize exposure to ambient humidity and avoid contact with moisture or strong bases during handling.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identity (IR)	Conforms to reference standard
Assay (GC)	≥98.5%
Chloride Content	24.5–25.5% (w/w)
Residue on Ignition	≤0.1%
Water (KF)	≤0.1%
Heavy Metals (as Pb)	≤10 ppm
Acidity (as HCl)	≤50 ppm

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