Description

2-(Trimethoxysilyl)Ethanethiol is a bifunctional organosilane coupling agent featuring both a hydrolyzable methoxysilyl group and a reactive thiol (-SH) group. This unique structure makes it a critical component for creating durable chemical bridges between inorganic substrates and organic polymers. It is essential for industries requiring enhanced adhesion, surface modification, and cross-linking in composite materials and coatings. Key users include manufacturers in the rubber, adhesive, sealant, and advanced materials sectors.

Application

• Silane Coupling Agent: Promotes adhesion between mineral fillers (like silica) and organic polymer matrices in rubber compounds, improving mechanical properties and wear resistance.
• Surface Modification: Used to functionalize glass, metal, or silica surfaces, introducing thiol groups for subsequent chemical grafting or to alter surface energy.
• Cross-linking Agent: Serves as a co-agent in peroxide-cured elastomers and plastics, enhancing cross-link density and network stability.
• Adhesive & Sealant Formulations: Improves bond strength and moisture resistance in polysulfide and polyurethane-based adhesives and sealants.
• Coatings & Resins: Incorporated into coatings to improve adhesion to difficult substrates and provide corrosion resistance.
• Precursor for Further Synthesis: The thiol group is a versatile handle for creating more complex silane derivatives via thiol-ene "click" chemistry or other reactions.

Basic Information

Product Name	2-(Trimethoxysilyl)Ethanethiol
CAS No.	7538-45-6
Molecular Formula	C5H14O3SSi
Molecular Weight	182.32 g/mol
Synonyms	(3-Mercaptopropyl)trimethoxysilane; 3-Mercaptopropyltrimethoxysilane; MPTMS; Trimethoxy(3-mercaptopropyl)silane; 3-(Trimethoxysilyl)-1-propanethiol; γ-Mercaptopropyltrimethoxysilane; Silane A-189; KH-590; Dynasylan MTMO
EINECS	231-416-1

Quality Control

Our production of 2-(Trimethoxysilyl)Ethanethiol adheres to stringent quality management protocols. Each batch undergoes comprehensive analysis to ensure consistency and high purity, typically meeting specifications of ≥97% (GC). Our quality assurance process includes verification of key parameters such as assay, refractive index, and specific gravity. Certificates of Analysis (COA) documenting these results are available upon request to support your quality and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated area. Recommended storage temperature is 2-8°C to minimize oxidation and maintain stability. Keep away from heat, sparks, open flames, and strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.440 - 1.445
Specific Gravity (20/4°C)	1.050 - 1.070

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