Description

(3-Bromopropyl)Triethoxysilane is a bifunctional organosilane coupling agent that features both a reactive bromoalkyl group and hydrolyzable ethoxysilane groups. This unique structure makes it a critical intermediate for introducing functional silane chemistry into polymers, surfaces, and composite materials. It is essential for manufacturers in the adhesives, sealants, coatings, and advanced materials sectors seeking to enhance adhesion, cross-linking, and surface modification.

Application

• Surface Modification Agent: Used to functionalize inorganic surfaces like glass, silica, and metals to improve adhesion with organic polymers.
• Coupling Agent in Composites: Enhances the interfacial bonding between mineral fillers (e.g., glass fibers, minerals) and polymer matrices in composite materials.
• Intermediate for Specialty Silanes: Serves as a key precursor for synthesizing other functional silanes through nucleophilic substitution of the bromine atom.
• Adhesive & Sealant Formulations: Incorporated to improve moisture resistance and bonding strength in silicone-based and hybrid polymer systems.
• Cross-linking Agent: Utilized in the production of cross-linked polymers and resins to enhance thermal and mechanical properties.
• Fiber Treatment: Applied as a sizing or finishing agent for glass and other reinforcing fibers to promote compatibility with resins.

Basic Information

Product Name	(3-Bromopropyl)Triethoxysilane
CAS No.	52090-18-3
Molecular Formula	C9H21BrO3Si
Molecular Weight	285.26 g/mol
Synonyms	3-Bromopropyltriethoxysilane; Triethoxy(3-bromopropyl)silane; (3-Bromopropyl)triethoxysilane; Silane, triethoxy(3-bromopropyl)-; 3-Bromopropyltriethoxysilane; Bromopropyltriethoxysilane; γ-Bromopropyltriethoxysilane; 52090-18-3
EINECS	257-660-5

Quality Control

Our (3-Bromopropyl)Triethoxysilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key specifications are provided with every shipment to guarantee compliance with your technical requirements.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent degradation from moisture absorption.

Specification

Item	Specification
Appearance	Clear colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (20°C)	1.15 - 1.18 g/cm³
Refractive Index (n20/D)	1.425 - 1.435

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