Description

Mercaptomethylmethyldiethoxysilane is a versatile organosilicon compound featuring both alkoxy and mercapto functional groups. This dual functionality makes it a highly effective coupling agent and surface modifier, crucial for enhancing adhesion and compatibility between inorganic materials and organic polymers. It is essential for manufacturers in the rubber, adhesive, sealant, and composite materials industries seeking to improve product performance and durability.

Application

• As a key silane coupling agent in filled rubber compounds (e.g., SBR, EPDM) to improve filler dispersion and mechanical properties.
• Surface treatment for silica, glass fibers, and minerals to promote bonding with polymer matrices in composites.
• Adhesion promoter in sealants, adhesives, and coatings for substrates like glass, metals, and concrete.
• Intermediate in the synthesis of more complex specialty silanes and silicone modifiers.
• Component in moisture-curable systems where the ethoxy groups hydrolyze to form siloxane networks.

Basic Information

Product Name	Mercaptomethylmethyldiethoxysilane
CAS No.	55161-63-2
Molecular Formula	C7H18O2SSi
Molecular Weight	194.37 g/mol
Synonyms	Mercaptomethylmethyldiethoxysilane; (Mercaptomethyl)methyldiethoxysilane; Diethoxy(mercaptomethyl)methylsilane; Methyldiethoxysilylmethyl mercaptan; 2-Mercaptoethylmethyldiethoxysilane (common misnomer); Silane, diethoxy(mercaptomethyl)methyl-; SCA 303 (potential trade name); Silane coupling agent KH-590 (common industry designation)
EINECS	Contact for details

Quality Control

Our Mercaptomethylmethyldiethoxysilane is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including assay by GC, purity verification, and control of key impurities, to ensure it meets precise specifications for industrial applications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and consistency.

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 prevent oxidation. Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed to exclude moisture. Recommended storage temperature is 2-25°C. Keep away from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.430 - 1.440
Density (g/mL, 20°C)	0.950 - 0.980

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