Description

3-[Tris(2-Ethoxyethoxy)Silyl]Propanethiol is a specialized organosilane coupling agent featuring a unique tri(ethylene glycol) ethyl ether chain terminated with a thiol (-SH) functional group. This bifunctional structure is critical for creating durable covalent bonds between inorganic substrates and organic polymers, significantly enhancing material compatibility and interfacial adhesion. It is an essential raw material for formulators and material scientists in advanced manufacturing sectors requiring precise surface modification and robust composite performance.

Application

• Surface Modification Agent: Used to functionalize metal oxides (e.g., silica, titania), glass, and other inorganic surfaces to impart specific chemical reactivity or improve compatibility with organic matrices.
• Adhesion Promoter in Coatings & Sealants: Enhances the bond strength and durability of epoxy, polyurethane, and acrylic-based coatings, adhesives, and sealants on challenging substrates like glass, metals, and ceramics.
• Nanoparticle Stabilization & Functionalization: A key ligand for capping and stabilizing metal nanoparticles (e.g., gold, silver) to prevent aggregation and introduce thiol-based surface chemistry for further conjugation.
• Composite Material Interface Engineering: Improves the dispersion and interfacial bonding between fillers (like glass fibers or minerals) and polymer resins in high-performance composites, leading to enhanced mechanical properties.
• Sensor and Biosensor Fabrication: Employed to create self-assembled monolayers (SAMs) on gold or other surfaces for immobilizing biomolecules or creating specific sensing interfaces.
• Hydrophilic & Anti-fouling Surface Coatings: The ethoxyethoxy chains can impart hydrophilic character, making it useful in creating anti-fog, anti-fouling, or protein-resistant surfaces.

Basic Information

Product Name	3-[Tris(2-Ethoxyethoxy)Silyl]Propanethiol
CAS No.	67724-41-8
Molecular Formula	C21H46O6SSi
Molecular Weight	454.74 g/mol
Synonyms	(3-Mercaptopropyl)tris(2-ethoxyethoxy)silane; 3-(Tris(2-ethoxyethoxy)silyl)-1-propanethiol; Tris(2-ethoxyethoxy)(3-mercaptopropyl)silane; Silane, tris[2-(ethoxy)ethoxy]-3-mercaptopropyl-; Thiol-terminated triethoxysilane derivative; PEGylated mercaptosilane; SH-PEG-silane (generic); Mercaptopropyl PEG silane
EINECS	Contact for details

Quality Control

Our production of 3-[Tris(2-Ethoxyethoxy)Silyl]Propanethiol adheres to a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, functionality, and performance. Key parameters monitored include assay (by titration or NMR), thiol content, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

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 moisture-sensitive (hygroscopic) and should be kept under an inert atmosphere (e.g., nitrogen) after opening to prevent oxidation and hydrolysis. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (NMR/Titration)	≥ 95.0%
Thiol Content	≥ 6.5 mmol/g
Refractive Index (n20/D)	1.445 - 1.455
Density (g/mL, 25°C)	1.05 - 1.10

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