Description

Ethynyltriethoxysilane is a highly reactive organosilicon compound featuring both an ethynyl group and hydrolyzable ethoxy groups. This unique bifunctional structure makes it a critical coupling agent and monomer for creating hybrid organic-inorganic materials with tailored properties. It is essential for manufacturers in the advanced materials, coatings, and electronics sectors seeking to enhance adhesion, cross-linking density, and surface modification. Our supply of Ethynyltriethoxysilane CAS NO 5700-28-7 ensures consistent quality for demanding industrial and R&D applications.

Application

• Cross-linking Agent for Silicone Polymers: Imparts enhanced thermal and mechanical properties to silicone rubbers and resins.
• Surface Modification of Inorganic Fillers: Acts as a coupling agent for silica, glass fibers, and minerals to improve compatibility with organic polymer matrices in composites.
• Adhesion Promoter in Coatings and Sealants: Improves bond strength and durability of coatings, adhesives, and sealants on glass, metal, and mineral surfaces.
• Precursor for Sol-Gel Chemistry: Used to synthesize hybrid organic-inorganic materials, films, and nanoparticles with specific optical or electronic functions.
• Intermediate for Specialty Chemical Synthesis: Serves as a building block for synthesizing more complex organosilicon molecules and dendrimers.
• Waterproofing Agent: Used in treatments for textiles, construction materials, and stone to impart hydrophobic characteristics.

Basic Information

Product Name	Ethynyltriethoxysilane
CAS No.	5700-28-7
Molecular Formula	C8H16O3Si
Molecular Weight	188.30 g/mol
Synonyms	Triethoxy(ethynyl)silane; Ethynyltriethoxysilicon; (Ethynyl)triethoxysilane; Silane, triethoxyethynyl-; Ethynylsilanetriol triethyl ether; 2-Triethoxysilylacetylene; Acetylene, (triethoxysilyl)-; EINECS 227-183-5
EINECS	227-183-5

Quality Control

Our Ethynyltriethoxysilane is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC) and infrared spectroscopy (IR), to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment. We are committed to meeting the quality standards required for industrial and research applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed and under a dry inert atmosphere (e.g., nitrogen) for long-term storage to prevent hydrolysis and polymerization. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (20°C)	0.92 - 0.96 g/mL
Refractive Index (n20/D)	1.395 - 1.405

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