Description

3-(Methoxydimethylsilyl)Propanethiol is a specialized organosilicon compound featuring both a methoxysilyl and a thiol functional group, enabling dual reactivity. This unique structure makes it a critical coupling agent and surface modifier in advanced material synthesis. It is essential for manufacturers in the adhesives, sealants, coatings, and rubber industries seeking to enhance material compatibility and performance.

Application

• Silane Coupling Agent: Used to improve adhesion between inorganic fillers (like silica, glass) and organic polymer matrices in composites and tires.
• Surface Modification: Functionalizes metal oxides, nanoparticles, and glass surfaces to introduce thiol groups for further chemical grafting.
• Adhesive & Sealant Formulation: Acts as an adhesion promoter and crosslinker in silicone, polyurethane, and polysulfide-based systems.
• Rubber Reinforcement: Enhances the dispersion and bonding of silica in silica-filled rubber compounds, improving mechanical properties.
• Polymer Synthesis: Serves as a chain-transfer agent (CTA) or functional initiator in controlled radical polymerizations (e.g., RAFT).
• Chemical Intermediate: Used in the synthesis of more complex organosilicon molecules for pharmaceuticals and agrochemicals.
• Protective Coatings: Imparts corrosion resistance and improved substrate bonding in specialized coating formulations.

Basic Information

Product Name	3-(Methoxydimethylsilyl)Propanethiol
CAS No.	14857-97-7
Molecular Formula	C6H16OSSi
Molecular Weight	164.34 g/mol
Synonyms	3-(Dimethylmethoxysilyl)-1-propanethiol; (3-Mercaptopropyl)methyldimethoxysilane (common error, check structure); γ-Mercaptopropylmethyldimethoxysilane; 3-Mercaptopropylmethyldimethoxysilane; MPTMS (common abbreviation, verify methoxy vs. dimethoxy); Methoxydimethylsilylpropanethiol; Silane A-189 (potential trade name equivalent); 14857-97-7; Propanethiol, 3-(methoxydimethylsilyl)-
EINECS	Contact for details

Quality Control

Our production of 3-(Methoxydimethylsilyl)Propanethiol follows stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced chromatographic and spectroscopic methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles 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, well-ventilated area at room temperature (15-25°C). Due to its highly volatile and light-sensitive nature, containers should be kept tightly sealed when not in use to prevent evaporation and degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.460 - 1.470
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.