Description

Ethyltrimethoxysilane is a versatile organosilicon compound, specifically an alkyltrialkoxysilane, that serves as a critical coupling agent and building block in advanced material synthesis. Its primary value lies in its ability to form stable bonds between organic polymers and inorganic surfaces, enhancing composite material performance. This chemical is essential for manufacturers in the adhesives, sealants, coatings, and electronics industries seeking to improve product durability, adhesion, and moisture resistance.

Application

• Crosslinking Agent: Used in silicone resin formulations to improve hardness, thermal stability, and chemical resistance.
• Surface Modification: Acts as a primer or adhesion promoter for coatings on glass, metals, and minerals.
• Composite Materials: Functions as a coupling agent in fiberglass-reinforced plastics and mineral-filled polymer composites.
• Silicon Dioxide Precursor: Employed in sol-gel processes to produce thin films and coatings for optical and electronic applications.
• Water Repellents: A key ingredient in formulations for creating hydrophobic surfaces on construction materials.
• Intermediate for Further Synthesis: Serves as a starting material for producing more complex functional silanes and silicone polymers.

Basic Information

Product Name	Ethyltrimethoxysilane
CAS No.	5314-55-6
Molecular Formula	C5H14O3Si
Molecular Weight	150.25 g/mol
Synonyms	Ethyltrimethoxysilane; Triethoxy(ethyl)silane; Ethyltriethoxysilane (common misnomer, verify structure); ETMS; Ethyl trimethoxy silane; Silane, ethyltrimethoxy-; Ethylsilanetriol trimethyl ether; A 162 (potential trade name); Dynasylan® ETMO (potential trade name)
EINECS	226-155-5

Quality Control

Our Ethyltrimethoxysilane is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality commitment aligns with global chemical industry standards, and we can support compliance documentation for REACH and other regional regulatory frameworks upon request.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen) to prevent hydrolysis and degradation upon contact with atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Density (20°C)	0.89 - 0.91 g/cm³
Refractive Index (n20/D)	1.382 - 1.386
Water Content (Karl Fischer)	≤ 0.1%

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