Description

Diethoxychlorosilane is a versatile organosilicon compound primarily used as a key intermediate in the synthesis of silicone polymers and functional silanes. Its value lies in its bifunctional reactivity, where the chlorine and ethoxy groups can be selectively modified to create tailored materials for demanding industrial applications. This chemical is essential for manufacturers in the semiconductor, pharmaceutical, and specialty coatings industries who require high-purity precursors for surface modification and cross-linking reactions.

Application

• Semiconductor Manufacturing: As a surface-modifying agent and precursor for silicon dioxide (SiO₂) thin films in chemical vapor deposition (CVD) processes.
• Silicone Resin Synthesis: A key monomer for producing heat-resistant and chemically stable silicone resins and elastomers.
• Adhesive & Sealant Formulations: Used as a cross-linking agent and adhesion promoter in high-performance silicone-based adhesives and sealants.
• Pharmaceutical Intermediates: Serves as a protecting group or building block in the synthesis of complex drug molecules and silane-modified active ingredients.
• Water Repellent Coatings: Imparts hydrophobic properties to surfaces like glass, ceramics, and textiles when used as a coating precursor.
• Filler Treatment: Modifies the surface of inorganic fillers (e.g., silica, minerals) to improve compatibility and dispersion in polymer composites.
• Chemical Research & Development: A valuable reagent for synthesizing novel organosilicon compounds and materials in R&D laboratories.

Basic Information

Product Name	Diethoxychlorosilane
CAS No.	6485-91-2
Molecular Formula	C4H11ClO2Si
Molecular Weight	154.67 g/mol
Synonyms	Chlorodiethoxysilane; Diethoxy(chloro)silane; Diethoxysilyl chloride; Silane, chlorodiethoxy-; NSC 93725; (Diethoxy)chlorosilane; Chlorosilane, diethoxy-; EINECS 229-347-1
EINECS No.	229-347-1

Quality Control

Our Diethoxychlorosilane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including gas chromatography (GC) for assay and impurity profiling. A Certificate of Analysis (COA) detailing purity, identity, and specific test results is 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 away from heat and incompatible materials. Due to its moisture-sensitive (hygroscopic) nature, containers must be kept sealed under a dry inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis. Recommended storage temperature: 2-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Chlorosilane Content	≥ 99.0%
Dichlorosilane Impurity (GC)	≤ 0.5%
Water Content (Karl Fischer)	≤ 0.1%
Density at 20°C	1.05 - 1.08 g/mL
Refractive Index (n20D)	1.395 - 1.405

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