Description

Thioacetic Acid S-[2-(Triethoxysilyl)Ethyl] Ester is a bifunctional organosilane coupling agent that combines a reactive triethoxysilyl group with a thioester functionality. This unique structure makes it a critical intermediate for creating durable chemical bridges between inorganic substrates and organic polymers. It is primarily sought after by manufacturers in the advanced materials and specialty chemicals sectors for enhancing adhesion, cross-linking efficiency, and surface modification.

Application

• Silane Coupling Agent: Used to improve the adhesion and compatibility between mineral fillers (e.g., silica, glass) and organic polymer matrices in composites, sealants, and adhesives.
• Surface Modification: Functionalizes the surface of metals, glass, and minerals to introduce thioester groups for subsequent chemical grafting or to alter surface properties.
• Cross-linking Agent: Serves as a co-agent in the peroxide-cured systems for elastomers like EPDM and silicone, enhancing cross-link density and thermal stability.
• Polymer Synthesis: Acts as a chain transfer agent or functional monomer in the synthesis of specialty polymers with tailored end-group functionality.
• Adhesive & Sealant Formulations: Incorporated to boost the bonding strength and environmental resistance of high-performance polyurethane, polysulfide, or silicone-based formulations.
• Rubber Reinforcement: Improves the reinforcement of silica-filled rubber compounds, leading to better abrasion resistance and lower rolling resistance in tire applications.

Basic Information

Product Name	Thioacetic Acid S-[2-(Triethoxysilyl)Ethyl] Ester
CAS No.	40055-63-8
Molecular Formula	C10H22O4SSi
Molecular Weight	266.43 g/mol
Synonyms	(3-Triethoxysilylpropyl) thioacetate; 3-(Triethoxysilyl)propyl thioacetate; S-[3-(Triethoxysilyl)propyl] ethanethioate; 3-Thioacetylpropyltriethoxysilane; Thioacetic acid S-(3-triethoxysilylpropyl) ester; Silane A-1891 (common trade name equivalent); 3-(Triethoxysilyl)-1-propanethiol acetate; Acetylthiopropyltriethoxysilane
EINECS	254-793-7

Quality Control

Our production of Thioacetic Acid S-[2-(Triethoxysilyl)Ethyl] Ester adheres to stringent quality management protocols. Each batch is analyzed to ensure high purity and consistency, with key parameters verified via GC, NMR, and titration methods. Certificates of Analysis (COA) detailing purity, identity, and specific impurity profiles are available upon request to support your quality assurance and regulatory needs.

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/59-77°F). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed after opening to prevent hydrolysis and degradation. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Refractive Index (n20/D)	1.430 - 1.440
Density (g/mL, 20°C)	1.010 - 1.050

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