Description

Dimethylmethoxychlorosilane is a highly reactive organosilicon compound primarily used as a versatile building block in silicone chemistry. Its value lies in its ability to introduce both methyl and methoxy functional groups, serving as a key intermediate for modifying surfaces and synthesizing more complex siloxane structures. This product is essential for manufacturers in the silicone polymer, pharmaceutical, and advanced materials industries who require precise functionalization and controlled reactivity.

Application

• Silicone Intermediate: A fundamental precursor in the synthesis of silicone oils, resins, and elastomers, where it acts as a chain terminator or cross-linking agent.
• Surface Modification: Used to hydrophobize and functionalize inorganic surfaces like silica, glass, and metals, improving compatibility with organic matrices.
• Pharmaceutical Synthesis: Serves as a protecting group or silylating agent in the synthesis of active pharmaceutical ingredients (APIs) and other fine chemicals.
• Adhesive & Sealant Formulation: Imparts specific adhesion and curing properties in high-performance silicone-based adhesives and sealants.
• Coupling Agent: Enhances the bond between organic polymers and inorganic fillers in composite materials, improving mechanical properties.
• Laboratory Reagent: Employed in research and development for introducing dimethyl(methoxy)silyl groups into target molecules.

Basic Information

Product Name	Dimethylmethoxychlorosilane
CAS No.	1825-68-9
Molecular Formula	C3H9ClOSi
Molecular Weight	124.64 g/mol
Synonyms	Chlorodimethylmethoxysilane; Methoxychlorodimethylsilane; Dimethyl(methoxy)chlorosilane; Methoxydimethylchlorosilane; (Methoxydimethylsilyl)chloride; NSC 66130; Silane, chlorodimethylmethoxy-; Dimethylmethoxysilyl chloride
EINECS	217-374-9

Quality Control

Our Dimethylmethoxychlorosilane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including Gas Chromatography (GC) and NMR to verify identity and assay. Certificates of Analysis (COA) detailing purity and impurity profiles are provided with every shipment to support your quality assurance protocols.

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 highly volatile and hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis and maintain product integrity. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases, acids, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Density (at 20°C)	0.96 - 0.98 g/mL
Refractive Index (n20D)	1.395 - 1.405
Chloride Content	≤ 0.5%

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