Description

3-(Dimethoxymethylsilyl)-2-Methylpropanethiol is a specialized organosilicon compound featuring both alkoxysilyl and thiol functional groups, enabling dual reactivity for advanced material synthesis. This unique structure makes it a critical intermediate for creating high-performance silane coupling agents and functional polymers with tailored surface properties. It is essential for manufacturers in the adhesives, sealants, coatings, and rubber industries seeking to enhance material compatibility, adhesion, and cross-linking efficiency.

Application

• Silane Coupling Agent Precursor: Key intermediate for synthesizing bifunctional silanes used to improve adhesion between inorganic fillers (e.g., silica, glass) and organic polymer matrices.
• Surface Modification of Fillers: Imparts reactive thiol groups onto silica, minerals, or metal oxide surfaces to enhance dispersion and reinforcement in composite materials.
• Cross-linking Agent for Polymers: Functions as a co-agent or cross-linker in peroxide-cured elastomers and specialty rubbers to modify cure characteristics and network density.
• Adhesive & Sealant Formulations: Incorporated to improve adhesion to difficult substrates and provide moisture-curing properties in silicone-modified polymers (MS Polymers).
• Specialty Coatings: Used to develop coatings with improved scratch resistance, corrosion protection, and substrate wetting through surface functionalization.
• Pharmaceutical & Agrochemical Intermediates: Serves as a building block for synthesizing more complex molecules with specific biological activity or delivery mechanisms.

Basic Information

Product Name	3-(Dimethoxymethylsilyl)-2-Methylpropanethiol
CAS No.	14857-92-2
Molecular Formula	C7H18O2SSi
Molecular Weight	194.37 g/mol
Synonyms	2-Methyl-3-(dimethoxymethylsilyl)-1-propanethiol; (3-Mercapto-2-methylpropyl)methyldimethoxysilane; 3-(Methyldimethoxysilyl)-2-methyl-1-propanethiol; Mercaptopropylmethyldimethoxysilane (variation); MDMSPT; Silane coupling agent KH-591 (related trade designation); Thiol-functional methyldimethoxysilane
EINECS	Contact for details

Quality Control

Our production of 3-(Dimethoxymethylsilyl)-2-Methylpropanethiol adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including GC and NMR, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key physical properties are provided with each shipment to support your quality assurance and R&D processes.

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, away from heat sources and incompatible materials such as strong oxidizing agents. Due to its highly volatile and easily oxidized nature, the container must be kept sealed and handled under inert conditions to maintain product integrity. Recommended storage temperature: 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.450 - 1.460
Density (20°C)	0.95 - 1.00 g/mL

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