Description

Hexaethoxydisilane is a high-purity organosilicon compound, widely recognized as a versatile chemical precursor in advanced material synthesis. Its value lies in its ability to act as a reactive silane source, forming silicon-containing networks and modifying surfaces with ethoxy functional groups. This product is essential for manufacturers and researchers in the semiconductor, specialty glass, and advanced ceramics industries seeking to enhance material properties through precise chemical modification.

Application

• Semiconductor Manufacturing: Used as a silicon source in chemical vapor deposition (CVD) and atomic layer deposition (ALD) processes for depositing thin silicon oxide or silicon-based dielectric films.
• Sol-Gel Chemistry: Serves as a key precursor for the synthesis of silica gels, hybrid organic-inorganic materials, and controlled-porosity glasses.
• Surface Modification: Employed to functionalize inorganic surfaces (e.g., glass, metals, oxides) with silane layers to alter wettability, adhesion, or corrosion resistance.
• Advanced Ceramics & Composites: Acts as a binder or cross-linking agent in the production of silicon carbide (SiC) or silicon nitride (Si3N4) pre-ceramic polymers.
• Protective Coatings: Utilized in formulating transparent, hard, and chemically resistant coatings for optical and electronic components.
• Adhesive & Sealant Formulations: Functions as an adhesion promoter and cross-linker in high-performance silicone-based adhesives and sealants.
• Research & Development: A critical reagent in academic and industrial R&D for developing novel silicon-based polymers and nanomaterials.

Basic Information

Product Name	Hexaethoxydisilane
CAS No.	5851-08-1
Molecular Formula	C12H30O6Si2
Molecular Weight	326.54 g/mol
Synonyms	Disiloxane, Hexaethoxy-; Hexaethoxydisiloxane; 1,1,1,3,3,3-Hexaethoxy-1,3-disiloxane; Bis(triethoxysilyl) Ether; Triethoxysiloxytriethoxysilane; Ethyl Silicate Dimer; TEOS Dimer; Contact for additional trade names.
EINECS	227-455-8

Quality Control

Our Hexaethoxydisilane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including gas chromatography (GC) and nuclear magnetic resonance (NMR) spectroscopy, to verify identity and assay. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key specifications and test results.

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 hygroscopic nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and hydrolysis.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0%
Density (at 20°C)	0.92 - 0.96 g/mL
Refractive Index (n20D)	1.380 - 1.390
Moisture (Karl Fischer)	≤ 0.1%

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