Description

Methyltrimethoxysilane is a versatile organosilicon compound, widely recognized as a key coupling agent and precursor in advanced material synthesis. Its primary value lies in its ability to form stable bonds between inorganic substrates and organic polymers, enhancing composite material performance. This product is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producers of specialty silica and cross-linked polymers.

Application

• As a coupling agent in mineral-filled composites (e.g., fiberglass, minerals) to improve mechanical properties and moisture resistance.
• As a cross-linking agent and network former in silicone resins and room-temperature-vulcanizing (RTV) silicone rubbers.
• As a surface treatment agent for silica, glass fibers, and other inorganic materials to promote organic compatibility.
• As a key precursor in sol-gel processes for producing hybrid organic-inorganic coatings and thin films with tailored properties.
• In the formulation of water repellents and masonry protection treatments for construction materials.
• In the synthesis of specialty silanes and modified siloxanes for advanced adhesive and sealant applications.

Basic Information

Product Name	Methyltrimethoxysilane
CAS No.	1185-55-3
Molecular Formula	C4H12O3Si
Molecular Weight	136.22 g/mol
Synonyms	Methyltrimethoxysilane; Methyltrimethoxysilane; Methyltrimethoxysilane; Trimethoxymethylsilane; Methyltrimethoxysilane; Methyltrimethoxysilane; Methyltrimethoxysilane; Methyltrimethoxysilane
EINECS	214-685-0

Quality Control

Our Methyltrimethoxysilane is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including gas chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications for industrial applications. A Certificate of Analysis (COA) detailing all relevant parameters is provided with every shipment and is available upon request.

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 hygroscopic and highly volatile nature, containers must be kept tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent moisture absorption and degradation. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Density (20°C)	0.950 - 0.960 g/cm³
Refractive Index (n20D)	1.368 - 1.372
Water Content (Karl Fischer)	≤ 0.1%

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