Description

Benzyltriethoxysilane is a versatile organosilicon coupling agent and chemical intermediate. Its molecular structure, featuring both a reactive benzyl group and hydrolyzable ethoxy silane functionalities, makes it a critical component for enhancing adhesion and compatibility in composite materials. This product is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced material synthesis. Benzyltriethoxysilane CAS NO 2549-99-7 is valued for its ability to modify surfaces and polymers, improving performance and durability.

Application

• Surface Modification Agent: Used to treat glass, silica, and mineral fillers to improve their dispersion and bonding within polymer matrices like epoxies, polyurethanes, and silicones.
• Adhesion Promoter: A key ingredient in primers and adhesive formulations to enhance bond strength between organic polymers and inorganic substrates such as metals, glass, and concrete.
• Crosslinking Agent & Intermediate: Serves as a building block in the synthesis of specialized silicone resins, silane-modified polymers (SMP), and other hybrid organic-inorganic materials.
• Water Repellency & Corrosion Protection: Incorporated into protective coatings and sealants to impart hydrophobic properties and improve corrosion resistance on treated surfaces.
• Reinforced Composites: Enhances the mechanical properties of fiberglass and mineral-filled composites by promoting stronger interfacial adhesion between the filler and the resin.
• Electronic Encapsulants: Used in formulations for potting and encapsulating electronic components to provide moisture resistance and improved mechanical stability.

Basic Information

Product Name	Benzyltriethoxysilane
CAS No.	2549-99-7
Molecular Formula	C13H22O3Si
Molecular Weight	254.40 g/mol
Synonyms	(Benzyloxy)triethoxysilane; Benzyloxytrimethoxysilane (common misnomer); Triethoxy(benzyloxy)silane; Benzyl Triethoxysilane; Silane, benzyltriethoxy-; Benzyloxysilane triethoxide; (Phenylmethoxy)triethoxysilane; A 2171 (Momentive trade name)
EINECS	219-831-8

Quality Control

Our Benzyltriethoxysilane is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including GC (Gas Chromatography) for purity and assay, to ensure it meets precise specifications for industrial and R&D applications. A Certificate of Analysis (COA) detailing purity, identity, and key physical properties is provided with every shipment to guarantee traceability and consistency.

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 to prevent contact with atmospheric moisture, which can lead to hydrolysis. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.460 - 1.470
Density (20°C)	0.99 - 1.02 g/cm³

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