Description

Diethoxysilane is a highly reactive organosilicon compound primarily used as a key intermediate in the synthesis of advanced silicone polymers and functional silanes. Its value lies in its ability to introduce silicon-ethoxy functional groups, which are crucial for creating cross-linked networks, surface modifications, and adhesion promoters. This product is essential for manufacturers in the silicone elastomer, sealant, coating, and electronics industries seeking to enhance material properties like hydrophobicity, thermal stability, and mechanical strength.

Application

• Silicone Polymer Synthesis: A fundamental monomer for producing polydiethoxysiloxanes and other specialty silicone resins.
• Surface Modification Agent: Used to treat glass, silica, and metal oxides to improve hydrophobicity and compatibility with organic matrices.
• Adhesion Promoter: Functions as a coupling agent in composite materials, enhancing the bond between inorganic fillers and organic polymers.
• Precursor for Silane Coupling Agents: Serves as a starting material for synthesizing more complex organofunctional silanes.
• Electronics & Semiconductor: Employed in the deposition of silicon-containing thin films and as a precursor in chemical vapor deposition (CVD) processes.
• Cross-linking Agent: Imparts improved heat resistance and mechanical properties to silicone-based sealants and coatings.

Basic Information

Product Name	Diethoxysilane
CAS No.	18165-68-9
Molecular Formula	C4H12O2Si
Molecular Weight	120.22 g/mol
Synonyms	Silane, diethoxy-; Diethoxysilane; Dihydroxydiethoxysilane (hydrolyzed form); Ethoxysilane; Silicon diethoxide; Tetraethoxysilane precursor; DES; Contact for additional trade names.
EINECS	242-060-2

Quality Control

Our Diethoxysilane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques including Gas Chromatography (GC) and NMR to verify identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, moisture content, and other critical parameters is provided with each 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 temperatures between 15-25°C (59-77°F). 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 moisture absorption and degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (Karl Fischer)	≤ 0.1%
Density (20°C)	~0.86 g/mL
Refractive Index (n20D)	~1.375

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