Description

Triacetoxy(3-Mercaptopropyl)Silane is a bifunctional organosilane coupling agent that combines a hydrolyzable acetoxy group with a reactive mercapto (thiol) group. This unique structure makes it a critical component for enhancing adhesion and compatibility between inorganic materials and organic polymers. It is essential for manufacturers in the rubber, adhesive, sealant, and composite industries seeking to improve product durability and performance. The compound is supplied under strict quality control to ensure consistent reactivity and purity for demanding industrial applications.

Application

• As a coupling agent in silica-filled rubber compounds (e.g., tires, shoe soles) to improve reinforcement and reduce rolling resistance.
• As an adhesion promoter in sealants, adhesives, and coatings for glass, metals, and mineral surfaces.
• To modify and functionalize inorganic fillers (silica, glass fibers, minerals) for enhanced dispersion and bonding in polymer composites.
• In the synthesis of specialty silane-modified polymers (SMP) and hybrid organic-inorganic materials.
• As a surface treatment agent for nanoparticles to improve compatibility with various resin systems.
• In the production of moisture-curable systems where the acetoxy groups provide rapid curing.

Basic Information

Product Name	Triacetoxy(3-Mercaptopropyl)Silane
CAS No.	45189-99-9
Molecular Formula	C9H18O6SSi
Molecular Weight	282.39 g/mol
Synonyms	3-Mercaptopropyltriacetoxysilane; (3-Mercaptopropyl)triacetoxysilane; Triacetoxy(3-mercaptopropyl)silane; Silane, triacetoxy(3-mercaptopropyl)-; Mercaptopropyltriacetoxysilane; MPTAS; SH-Si(OAc)3; 3-(Triacetoxysilyl)-1-propanethiol
EINECS	Contact for details

Quality Control

Our Triacetoxy(3-Mercaptopropyl)Silane is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay, purity, and functional group verification, to ensure it meets precise specifications for industrial applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and performance consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) after opening to maintain stability and prevent degradation. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Clear to slightly yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 95.0%
Specific Gravity (25°C)	1.10 - 1.15
Refractive Index (n20D)	1.430 - 1.440

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