Description

Bis(Triethoxysilylmethyl) Sulfide is a specialized organosilicon compound that serves as a critical sulfur-containing silane coupling agent. Its molecular structure enables it to act as a powerful bridge between inorganic materials and organic polymers, significantly enhancing composite material performance. This chemical is essential for manufacturers in the rubber, adhesive, and advanced materials industries seeking to improve bonding, durability, and mechanical properties.

Application

• As a key coupling agent in silica-filled rubber compounds, such as those for high-performance tires, to reduce rolling resistance and improve wet grip.
• To enhance the adhesion and moisture resistance in sealants, adhesives, and coatings for construction and automotive applications.
• As a surface modifier for mineral fillers and glass fibers in reinforced plastic composites to improve interfacial bonding and mechanical strength.
• In the formulation of specialty resins and polymers where the incorporation of sulfur and silicon functionalities is required for specific thermal or chemical properties.
• For the cross-linking and vulcanization of various elastomers, contributing to improved heat resistance and aging characteristics.
• In research and development for creating novel hybrid organic-inorganic materials with tailored surface properties.

Basic Information

Product Name	Bis(Triethoxysilylmethyl) Sulfide
CAS No.	60764-85-4
Molecular Formula	C14H34O6S1Si2
Molecular Weight	386.66 g/mol
Synonyms	Bis(3-triethoxysilylpropyl) Sulfide (common name); Sulfur-bridged Silane Coupling Agent; Si-75 (common trade name); 3,3'-(Thiodimethylene)bis[1-triethoxysilane]; Bis(triethoxysilylpropyl) Sulfide; TESPT (abbreviation); Sulfur-containing Silane; (Triethoxysilylmethyl)sulfide
EINECS	Contact for details

Quality Control

Our production of Bis(Triethoxysilylmethyl) Sulfide adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The manufacturing process is controlled to meet the demanding specifications required for industrial coupling agent applications. Certificates of Analysis (COA) detailing purity, assay, and key physical-chemical parameters are provided with every shipment to guarantee product integrity and support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be kept under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain efficacy. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 95.0%
Refractive Index (n20D)	1.440 - 1.450
Density (20°C)	1.05 - 1.10 g/cm³
Water Content (KF)	≤ 0.5%

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