Description

11-Mercaptoundecyloxytrimethylsilane is a bifunctional organosilane coupling agent featuring a long alkyl chain terminated with a reactive mercapto (-SH) group and a hydrolyzable trimethoxysilane group. This unique structure makes it a critical component for creating durable covalent bonds between inorganic substrates and organic polymers or coatings. It is essential for manufacturers and R&D professionals in advanced materials science seeking to enhance adhesion, dispersion, and interfacial properties. Key industries that utilize this compound include specialty coatings, advanced composites, and surface modification technologies.

Application

• Surface Modification Agent: Used to functionalize metal oxides (e.g., silica, alumina, titania) and glass surfaces to introduce thiol groups for subsequent grafting or binding.
• Adhesion Promoter: Improves the bond strength and durability between inorganic fillers or substrates and organic polymer matrices in composites, sealants, and adhesives.
• Nanoparticle Functionalization: A key ligand for capping and stabilizing metal nanoparticles (e.g., gold, silver) to prevent aggregation and enable further chemical modification.
• Corrosion-Resistant Coatings: Incorporated into silane-based pretreatment systems for metals like aluminum and steel to enhance corrosion protection and paint adhesion.
• Sensor Fabrication: Serves as a molecular linker to immobilize biomolecules or recognition elements onto transducer surfaces in biosensor development.
• Rubber Reinforcement: Acts as a coupling agent in silica-filled rubber compounds (e.g., tires) to improve filler dispersion, reduce viscosity, and enhance mechanical properties.
• Chromatography Media: Used to modify stationary phases for HPLC columns to achieve specific separation selectivities via thiol chemistry.
• Dental & Biomedical Materials: Applied in the formulation of resin-based composites to strengthen the filler-matrix interface and improve material performance.

Basic Information

Product Name	11-Mercaptoundecyloxytrimethylsilane
CAS No.	394210-97-0
Molecular Formula	C₁₄H₃₂O₃SSi
Molecular Weight	308.56 g/mol
Synonyms	11-(Trimethoxysilyl)undecane-1-thiol; (11-Mercaptoundecyl)trimethoxysilane; 11-Mercaptoundecyltrimethoxysilane; 3-(11-Mercaptoundecyloxy)propyltrimethoxysilane (common misnomer); Undecyltrimethoxysilane, 11-mercapto-; Mercaptosilane; Thiol-functional trimethoxysilane; SH-Terminated alkylsilane
EINECS	Contact for details

Quality Control

Our 11-Mercaptoundecyloxytrimethylsilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity, consistent performance, and compliance with relevant industry standards. Key parameters monitored include assay (by titration or GC), thiol content, and silane purity. Certificates of Analysis (COA) detailing all specifications and test results are provided with every shipment and are available upon request.

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 place at 2-8°C to minimize oxidation and hydrolysis. This product is hygroscopic (moisture-sensitive) and easily oxidized. Allow the container to reach room temperature before opening to prevent moisture condensation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Thiol Content (Titration)	≥ 5.0 mmol/g
Refractive Index (n20/D)	1.455 - 1.465
Density (20°C)	0.95 - 0.98 g/mL

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