Description

3-(Diethoxymethylsilyl)-1-Propanethiol is a bifunctional organosilicon compound featuring both a hydrolyzable ethoxysilyl group and a reactive thiol (mercaptan) terminus. This unique structure makes it an exceptionally versatile coupling agent and surface modifier, enabling strong covalent bonds between inorganic substrates and organic polymers. It is essential for manufacturers in the advanced materials, coatings, and adhesives sectors seeking to enhance composite material performance, adhesion, and durability. The product is supplied under strict quality control to ensure batch-to-batch consistency for demanding industrial applications.

Application

• Silane Coupling Agent: Primarily used as a bifunctional silane coupling agent to improve the adhesion between inorganic materials (glass, metals, minerals) and organic polymers (rubbers, resins, plastics).
• Surface Modification: Imparts specific surface properties to fillers (e.g., silica, carbon black) and nanoparticles, improving their dispersion and compatibility within polymer matrices.
• Adhesive & Sealant Formulations: Serves as an adhesion promoter in high-performance silicone, polyurethane, and polysulfide-based sealants and adhesives.
• Crosslinking Agent: Functions as a crosslinker or chain extender in the synthesis of specialty polymers and elastomers, utilizing the reactivity of the thiol group.
• Coatings & Inks: Enhances the scratch resistance, chemical resistance, and adhesion of coatings, paints, and printing inks to various substrates.
• Rubber Reinforcement: Used in the production of silica-reinforced rubber compounds (e.g., for green tires) to reduce rolling resistance and improve mechanical properties.
• Intermediate for Further Synthesis: Acts as a key building block for the synthesis of more complex organosilicon molecules and functional materials.

Basic Information

Product Name	3-(Diethoxymethylsilyl)-1-Propanethiol
CAS No.	13818-38-7
Molecular Formula	C8H20O2SSi
Molecular Weight	208.40 g/mol
Synonyms	(3-Mercaptopropyl)methyldiethoxysilane; 3-Mercaptopropylmethyldiethoxysilane; Mercaptopropylmethyldiethoxysilane; MPMDES; Dynasylan 3201; Silane A-1891 (analogous); Methyldiethoxysilylpropyl mercaptan; 1-Propanethiol, 3-(diethoxymethylsilyl)-; γ-Mercaptopropylmethyldiethoxysilane
EINECS	237-494-5

Quality Control

Our production of 3-(Diethoxymethylsilyl)-1-Propanethiol adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, refractive index, and specific gravity are provided and available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is easily oxidized (store under inert atmosphere) and is light-sensitive. Keep away from heat, sparks, open flames, and strong oxidizing agents. Under recommended storage conditions, the product remains stable.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20/D)	1.4400 - 1.4450
Specific Gravity (20/4°C)	0.950 - 0.980

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