Description

3,3,11,11-Tetramethoxy-2,12-Dioxa-7-Thia-3,11-Disilatridecane is a specialized organosilicon compound featuring a unique sulfur-bridged structure with terminal methoxy groups. This molecular architecture makes it a valuable silane coupling agent and crosslinking precursor in advanced material synthesis. It is primarily sought by manufacturers in the rubber, polymer, and adhesive industries for enhancing material properties and interfacial adhesion.

Application

• Silane Coupling Agent: Used to improve the bond between inorganic fillers (like silica, glass) and organic polymer matrices in composite materials.
• Rubber Vulcanization: Acts as a crosslinking agent or co-agent in the production of specialty rubbers, improving tensile strength and heat resistance.
• Adhesive & Sealant Formulation: Enhances adhesion, cohesion, and moisture resistance in high-performance polyurethane, silicone, and polysulfide-based systems.
• Surface Modification: Employed to treat glass fibers, minerals, or metal surfaces to promote compatibility with organic resins.
• Polymer Synthesis: Serves as a monomer or chain extender in the synthesis of novel polyethers, polythioethers, and hybrid organic-inorganic polymers.
• Lubricant & Grease Additive: Utilized as an extreme pressure (EP) additive or viscosity modifier in specialty lubricants.

Basic Information

Item	Detail
Product Name	3,3,11,11-Tetramethoxy-2,12-Dioxa-7-Thia-3,11-Disilatridecane
CAS No.	29055-11-6
Molecular Formula	C12H30O6S1Si2
Molecular Weight	346.60 g/mol
Synonyms	Bis[3-(trimethoxysilyl)propyl] Sulfide; 3,3,11,11-Tetramethoxy-2,12-dioxa-7-thia-3,11-disilatridecane; (3-Mercaptopropyl)trimethoxysilane dimer; Sulfur-bridged bis(trimethoxysilylpropane); SIB 1832.0; Si 75 (common trade name); Bis(trimethoxysilylpropyl) sulfide; 1,1'-[Thiobis(methylene)]bis[1,1,1-trimethoxy-3-silapropane]
EINECS	Contact for details

Quality Control

Our production of 3,3,11,11-Tetramethoxy-2,12-Dioxa-7-Thia-3,11-Disilatridecane adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analysis, including assay, identity confirmation, and impurity profiling. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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/59-77°F). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) after opening to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Refractive Index (n20/D)	1.440 - 1.450
Density (20°C)	1.05 - 1.10 g/cm³

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