Description

11-Mercaptoundecyltrimethoxysilane is a bifunctional organosilane coupling agent featuring a long aliphatic chain terminated with a reactive thiol (-SH) group and three hydrolyzable methoxysilane groups. This unique structure is critical for creating durable covalent bonds between inorganic substrates and organic polymers, significantly enhancing composite material performance. It is essential for manufacturers in the advanced materials, coatings, and electronics industries seeking to improve adhesion, dispersion, and mechanical properties in their products.

Application

• Surface Modification Agent: Primarily used to functionalize metal oxides (e.g., silica, alumina, glass) and metal surfaces (e.g., gold, silver) to introduce thiol groups for subsequent binding or polymerization.
• Rubber & Tire Reinforcement: Acts as a key coupling agent in silica-filled rubber compounds, improving the silica-rubber interface to reduce rolling resistance, enhance wet grip, and increase tire durability.
• Adhesion Promoter in Coatings: Improves the adhesion of paints, inks, and adhesives to difficult-to-bond substrates like metals, glass, and plastics, especially in humid or corrosive environments.
• Nanomaterial Functionalization: Used to modify nanoparticles (quantum dots, carbon nanotubes, metal NPs) to improve their dispersion in organic matrices and tailor their surface chemistry for specific applications.
• Dental & Biomedical Composites: Enhances the bond strength between inorganic fillers (e.g., glass ceramics) and resin matrices in dental restorative materials and bone cements.
• Fiberglass & Composite Manufacturing: Applied as a sizing or primer on glass fibers to improve resin wettability and interfacial bonding in fiber-reinforced plastics (FRP).

Basic Information

Product Name	11-Mercaptoundecyltrimethoxysilane
CAS No.	877593-17-4
Molecular Formula	C14H32O3SSi
Molecular Weight	308.56 g/mol
Synonyms	3-(Trimethoxysilyl)-1-undecanethiol; (11-Mercaptoundecyl)trimethoxysilane; Undecyltrimethoxysilane, 11-mercapto-; 11-Mercaptoundecyltrimethoxysilane; Mercaptosilane; Silane coupling agent MPTS analog (C11); Thiol-terminated trimethoxysilane; 11-(Trimethoxysilyl)undecane-1-thiol
EINECS	Contact for details

Quality Control

Our 11-Mercaptoundecyltrimethoxysilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by GC or HPLC, purity verification, and confirmation of functional group integrity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key specifications to ensure consistency and performance for your application. Our quality commitment supports compliance with relevant industry standards for material traceability and reliability.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated area at 2-8°C to minimize oxidation and volatility. Keep away from heat, sparks, and open flame. Due to its moisture-sensitive and highly volatile nature, allow the container to reach room temperature before opening to prevent condensation and minimize loss.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Refractive Index (n20D)	1.450 - 1.460
Density (g/mL, 25°C)	0.95 - 0.99

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