Description

[2-(Triethoxysilyl)Ethylthio]Acetic Acid is a bifunctional organosilane coupling agent that combines a hydrolysable triethoxysilyl group with a thioacetic acid functional group. This unique structure enables it to act as a powerful molecular bridge, creating strong, durable bonds between inorganic substrates and organic polymers or coatings. It is essential for formulators and manufacturers seeking to enhance adhesion, mechanical properties, and long-term stability in composite materials. Key industries that utilize this advanced silane include adhesives & sealants, specialty coatings, and advanced rubber and plastic composites.

Application

• Adhesives & Sealants: As a key adhesion promoter for silicone, polyurethane, and epoxy-based formulations, improving bond strength to glass, metals, and minerals.
• Coatings & Inks: Enhances the adhesion, scratch resistance, and corrosion protection of industrial and automotive coatings on difficult-to-bond surfaces.
• Rubber & Tire Manufacturing: Functions as a coupling agent in silica-filled rubber compounds, improving filler dispersion, reducing rolling resistance, and enhancing wear resistance.
• Fiberglass & Composite Materials: Used as a sizing or finishing agent to improve the interfacial bonding between glass fibers and polymer matrices like polyester or epoxy.
• Mineral & Filler Treatment: Modifies the surface of fillers (e.g., silica, clay) to improve compatibility and dispersion within plastic and elastomer compounds.
• Metal Surface Pretreatment: Applied in primer formulations to promote coating adhesion on aluminum, steel, and other metals.

Basic Information

Product Name	[2-(Triethoxysilyl)Ethylthio]Acetic Acid
CAS No.	82778-99-2
Molecular Formula	C12H26O5SSi
Molecular Weight	310.48 g/mol
Synonyms	3-(Triethoxysilyl)propylthioacetic acid; (3-Triethoxysilylpropylthio)acetic acid; 2-(3-(Triethoxysilyl)propylthio)acetic acid; Thioacetic acid S-[3-(triethoxysilyl)propyl] ester; S-[3-(Triethoxysilyl)propyl] thioacetate; Silane A-1891 (analogous); Mercaptoacetic acid triethoxysilylpropyl ester; 3-(Triethoxysilyl)-1-propanethiol acetate
EINECS	Contact for details

Quality Control

Our production of [2-(Triethoxysilyl)Ethylthio]Acetic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including assay by GC or HPLC, identity confirmation (IR), and control of key impurities. A comprehensive Certificate of Analysis (COA) detailing all specifications and test results is provided with every shipment 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). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 95.0%
Refractive Index (n20/D)	1.450 - 1.460
Density (g/mL, 20°C)	1.05 - 1.10

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