Description

Bis(Triethoxysilyl)Methane is a versatile organosilicon compound, specifically a bridged bis-silane, that serves as a critical cross-linking and surface modification agent. Its molecular structure, featuring two hydrolyzable ethoxysilyl groups linked by a methylene bridge, enables it to form durable, flexible siloxane networks, enhancing adhesion, hydrophobicity, and mechanical properties in composite materials. This product is essential for manufacturers in the silicone rubber, advanced coatings, adhesives, and mineral filler treatment sectors seeking to improve product performance and longevity.

Application

• Cross-linking Agent for Silicone Polymers: Used to enhance the thermal stability and mechanical strength of high-performance silicone elastomers and resins.
• Surface Primer & Coupling Agent: Improves adhesion between organic polymers (e.g., epoxies, polyurethanes) and inorganic substrates like glass, metals, and minerals.
• Hydrophobic Coating Formulations: A key ingredient in water-repellent and anti-corrosion coatings for construction, automotive, and aerospace applications.
• Filler and Pigment Treatment: Modifies the surface of silica, clay, and other fillers to improve dispersion and compatibility in plastic and rubber compounds.
• Synthesis Intermediate: Serves as a building block for more complex silane molecules and hybrid organic-inorganic materials (ORMOSILs).
• Adhesive and Sealant Formulations: Imparts flexibility, moisture resistance, and enhanced bonding in high-strength adhesives and sealants.

Basic Information

Product Name	Bis(Triethoxysilyl)Methane
CAS No.	18418-72-9
Molecular Formula	C13H32O6Si2
Molecular Weight	340.57 g/mol
Synonyms	1,1'-(Methylenebis(silanetriyl))trioxy)tris(ethane); Methanediylbis(triethoxysilane); Bis(triethoxysilyl)methane; BTESM; Ethyl silicate dimer; Triethoxy[2-(triethoxysilyl)ethoxy]silane; (Triethoxysilyl)methane crosslinker; Di(triethoxysilyl)methane
EINECS	Contact for details

Quality Control

Our Bis(Triethoxysilyl)Methane is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including Gas Chromatography (GC) and FT-IR spectroscopy, to ensure high purity and consistent performance. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic and highly volatile nature, the container must be kept tightly sealed under dry conditions (e.g., under an inert atmosphere or with desiccant) to prevent moisture absorption and evaporation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Density (20°C)	~1.00 g/cm³
Refractive Index (n20D)	~1.405
Moisture (Karl Fischer)	≤ 0.5%

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