Description

3-Mercaptopropyltrimethylsilane is a bifunctional organosilicon compound featuring a reactive mercapto (thiol) group and hydrolyzable trimethoxysilane groups. This unique structure makes it a highly effective coupling agent and surface modifier, bridging organic polymers with inorganic substrates like glass, metals, and minerals. It is essential for industries requiring enhanced adhesion, dispersion, and mechanical properties in composite materials and coatings. Key applications include its use as a silane coupling agent in rubber reinforcement, adhesives, sealants, and as an intermediate for further chemical synthesis.

Application

• Silane Coupling Agent: Primarily used to improve the adhesion and bonding between inorganic materials (e.g., glass fibers, minerals, metals) and organic polymers (e.g., epoxy, polyurethane, rubber).
• Rubber Reinforcement: Functions as a key additive in silica-filled rubber compounds (tires, industrial rubber goods) to enhance filler dispersion, reduce viscosity, and improve mechanical properties like tensile strength and abrasion resistance.
• Surface Modification: Used to treat the surface of nanoparticles (silica, metals) and pigments to improve their compatibility and dispersion in various polymer matrices and coating systems.
• Adhesives and Sealants: Incorporated to enhance moisture resistance, durability, and adhesion strength, particularly in demanding environments.
• Intermediate for Chemical Synthesis: Serves as a versatile building block for synthesizing more complex organosilicon compounds, dendrimers, and functional materials.
• Crosslinking Agent: Can act as a crosslinker in certain polymer systems, contributing to network formation and improved thermal stability.

Basic Information

Product Name	3-Mercaptopropyltrimethylsilane
CAS No.	13399-93-4
Molecular Formula	C6H16SSi
Molecular Weight	148.34 g/mol
Synonyms	(3-Mercaptopropyl)trimethylsilane; 3-(Trimethylsilyl)-1-propanethiol; Trimethylsilylpropanethiol; Mercaptopropyltrimethylsilane; MPTMS; γ-Mercaptopropyltrimethylsilane; SH-(CH2)3-Si(CH3)3; 1-Propanethiol, 3-(trimethylsilyl)-
EINECS	236-556-1

Quality Control

Our 3-Mercaptopropyltrimethylsilane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications and consistent performance for industrial applications. A Certificate of Analysis (COA) detailing all relevant parameters is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized (store under inert atmosphere) and highly volatile. Keep away from heat, sparks, open flames, and strong oxidizing agents. Use appropriate grounding procedures during handling to prevent static discharge.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Purity (GC)	≥ 97.0%
Refractive Index (n20/D)	1.440 - 1.445
Density (20°C)	0.88 - 0.92 g/mL

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