Description

(Trimethoxysilyl)Methanethiol is a versatile organosilicon compound featuring both methoxysilyl and thiol functional groups. This dual functionality makes it a critical coupling agent and surface modifier, enabling strong adhesion between inorganic substrates and organic polymers. It is essential for manufacturers in the rubber, adhesive, and coatings industries seeking to enhance material durability and performance. The product is supplied as a high-purity chemical, identified by CAS NO 30817-94-8.

Application

• As a key silane coupling agent in silica-filled rubber compounds (e.g., tires, seals) to improve reinforcement and reduce rolling resistance.
• Surface treatment of glass fibers, minerals, and metal oxides to promote adhesion in composite materials and filled plastics.
• Primer or additive in adhesives and sealants to enhance bonding to glass, metal, and concrete surfaces.
• Modifier in specialty coatings and inks to improve scratch resistance, corrosion protection, and substrate wetting.
• Intermediate in the synthesis of more complex organosilicon derivatives and functional polymers.
• Crosslinking agent or chain transfer agent in specific polymerization processes.

Basic Information

Product Name	(Trimethoxysilyl)Methanethiol
CAS No.	30817-94-8
Molecular Formula	C4H12O3SSi
Molecular Weight	168.29 g/mol
Synonyms	3-Mercaptopropyltrimethoxysilane; Mercaptopropyltrimethoxysilane; Trimethoxy(3-mercaptopropyl)silane; (3-Mercaptopropyl)trimethoxysilane; MPTMS; Silane A-1891; Dynasylan MTMO; KH-590; γ-Mercaptopropyltrimethoxysilane
EINECS	250-312-0

Quality Control

Our (Trimethoxysilyl)Methanethiol is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with every shipment to guarantee consistency and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, containers should be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to prevent moisture absorption and oxidation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.440 - 1.445
Density (20°C)	1.05 - 1.07 g/mL

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