Description

3-Bromopropyltrimethoxysilane is a bifunctional organosilicon compound that serves as a versatile coupling agent and chemical intermediate. Its molecular structure combines a reactive bromoalkyl group with hydrolyzable methoxysilane functionalities, enabling it to form durable bonds between inorganic substrates and organic polymers. This product is essential for manufacturers in the adhesives, sealants, coatings, and advanced materials sectors seeking to enhance composite material performance, adhesion, and surface modification.

Application

• Surface Modification Agent: Used to functionalize glass, silica, metals, and other inorganic surfaces to improve adhesion and compatibility with organic resins and polymers.
• Coupling Agent in Composites: Enhances the interfacial bonding in fiberglass-reinforced plastics, mineral-filled composites, and rubber compounds, leading to improved mechanical properties.
• Intermediate for Specialty Silanes: Serves as a key precursor in the synthesis of more complex organofunctional silanes and silicone derivatives.
• Adhesive and Sealant Formulations: Incorporated to improve the wetting, bonding strength, and durability of epoxy, polyurethane, and silicone-based systems.
• Nanomaterial Functionalization: Used to modify nanoparticles (e.g., silica, titania) for better dispersion and integration into polymer matrices.
• Waterproofing and Protective Coatings: Applied in formulations for creating water-repellent and corrosion-resistant coatings on various substrates.

Basic Information

Product Name	3-Bromopropyltrimethoxysilane
CAS No.	51826-90-5
Molecular Formula	C6H15BrO3Si
Molecular Weight	243.17 g/mol
Synonyms	(3-Bromopropyl)trimethoxysilane; Trimethoxy(3-bromopropyl)silane; 3-Bromopropyltrimethoxysilane; γ-Bromopropyltrimethoxysilane; Bromopropyltrimethoxysilane; Silane, (3-bromopropyl)trimethoxy-; Br(CH2)3Si(OCH3)3; 51826-90-5
EINECS	257-446-6

Quality Control

Our production of 3-Bromopropyltrimethoxysilane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including Gas Chromatography (GC) and NMR to verify identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment, and we support compliance with relevant global chemical regulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent contact with atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 97.0%
Refractive Index (n20/D)	1.420 - 1.430
Density (20°C)	1.30 - 1.35 g/mL

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