Description

Thioacetic Acid S-[2-(Trimethoxysilyl)Ethyl] Ester is a bifunctional organosilane coupling agent that combines a reactive thioester group with a hydrolyzable trimethoxysilyl group. This unique structure makes it a critical intermediate for creating durable chemical bridges between inorganic substrates and organic polymers. It is essential for manufacturers in the adhesives, sealants, coatings, and composite materials industries seeking to enhance bonding strength, moisture resistance, and material compatibility.

Application

• As a key coupling agent and adhesion promoter in silicone, epoxy, and polyurethane-based sealants and adhesives.
• Surface modification of glass fibers, minerals, and metal oxides to improve dispersion and interfacial bonding in composite materials.
• Incorporation into protective coatings and primers for metals, glass, and concrete to enhance corrosion resistance and durability.
• As a functional silane intermediate in the synthesis of specialty polymers and resins with tailored surface properties.
• Modification of fillers and pigments in plastic and rubber compounds to improve mechanical properties and processing.

Basic Information

Product Name	Thioacetic Acid S-[2-(Trimethoxysilyl)Ethyl] Ester
CAS No.	16720-19-7
Molecular Formula	C9H20O5SSi
Molecular Weight	268.40 g/mol
Synonyms	3-(Trimethoxysilyl)propyl thioacetate; (3-Mercaptopropyl)trimethoxysilane thioacetate; S-[3-(Trimethoxysilyl)propyl] ethanethioate; 3-(Acetylthio)propyltrimethoxysilane; Thioacetic acid S-(3-trimethoxysilylpropyl) ester; Acetylthiopropyltrimethoxysilane; Silane A-189 thioacetate
EINECS	240-783-6

Quality Control

Our production of Thioacetic Acid S-[2-(Trimethoxysilyl)Ethyl] Ester adheres to stringent quality management protocols. Every batch undergoes comprehensive analysis to ensure consistent purity, reactivity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, identity, and impurity profiles are provided and 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, well-ventilated area under an inert atmosphere (e.g., nitrogen) to minimize oxidation. Due to its highly volatile nature, keep away from heat, sparks, and open flame. Recommended storage temperature is 2-8°C for extended shelf life.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.440 - 1.450
Density (20°C)	1.05 - 1.10 g/mL

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