Description

Dimethylethoxysilane is a versatile organosilicon compound primarily used as a key intermediate and surface modifying agent. Its value lies in its ability to introduce hydrophobic methyl groups and reactive ethoxy functionalities to various substrates and molecules. This product is essential for manufacturers in the silicone polymer, coatings, and electronics industries seeking to enhance material properties such as water repellency, adhesion, and chemical resistance.

Application

• Silicone Intermediate: A fundamental building block for the synthesis of silicone oils, resins, and elastomers.
• Surface Treatment: Used as a coupling agent or hydrophobizing agent for inorganic fillers (e.g., silica, glass fibers) and pigments to improve dispersion in organic matrices.
• Adhesion Promotion: Serves as a primer or additive in sealant and adhesive formulations to enhance bonding to difficult substrates.
• Water Repellency: Imparts durable water-repellent (DWR) characteristics to textiles, construction materials, and stone.
• Electronics & Semiconductor: Employed in the production of silicon-based dielectric materials and as a precursor in chemical vapor deposition (CVD) processes.
• Pharmaceutical & Agrochemistry: Acts as a protecting group or synthetic intermediate in the manufacture of active ingredients.

Basic Information

Product Name	Dimethylethoxysilane
CAS No.	14857-34-2
Molecular Formula	C4H12OSi
Molecular Weight	104.22 g/mol
Synonyms	Ethoxydimethylsilane; Dimethyl(ethoxy)silane; Dimethylsilane, ethoxy-; Ethyl dimethylsilanolate; (Ethoxy)dimethylsilane; DMES; EINECS 238-924-7
EINECS	238-924-7

Quality Control

Our Dimethylethoxysilane is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including gas chromatography (GC) for purity and identity verification, to ensure it meets precise customer and industry specifications. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat and ignition sources. Due to its highly volatile and hygroscopic nature, containers must be kept tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent moisture absorption and degradation. Recommended storage temperature: 2-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Density (20°C)	0.76 - 0.78 g/mL
Refractive Index (n20D)	1.372 - 1.376

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