Description

3,3,12,12-Tetramethoxy-2,13-dioxa-7,8-dithia-3,12-disilatetradecane is a specialized organosilicon compound featuring a unique disiloxane core bridged by a dithia chain. This molecular architecture makes it a valuable bifunctional coupling agent and precursor in advanced material synthesis. It is primarily sought by R&D and production teams in the silicone polymer, adhesive, and surface modification sectors for creating hybrid organic-inorganic networks with tailored properties.

Application

• Crosslinking Agent for Silicone Elastomers: Imparts improved thermal stability and mechanical strength to silicone rubbers and sealants.
• Surface Coupling Agent: Enhances adhesion between inorganic fillers (like silica) and organic polymer matrices in composite materials.
• Precursor for Functional Silanes: Serves as a key intermediate in the synthesis of more complex sulfur-containing silane coupling agents.
• Modifier for Specialty Resins: Used to incorporate siloxane and sulfide linkages into epoxy, polyurethane, or other resin systems to alter flexibility and chemical resistance.
• Lubricant & Grease Additive: Potential use as an extreme pressure (EP) additive or viscosity modifier in high-performance lubricants due to its sulfur and silicon content.
• Adhesive Formulation: Improves the bonding performance and durability of structural adhesives, especially on challenging substrates.

Basic Information

Product Name	3,3,12,12-Tetramethoxy-2,13-dioxa-7,8-dithia-3,12-disilatetradecane
CAS No.	35112-74-4
Molecular Formula	C12H30O6S2Si2
Molecular Weight	390.66 g/mol
Synonyms	Bis[3-(trimethoxysilyl)propyl] disulfide; 3,3,12,12-Tetramethoxy-2,13-dioxa-7,8-dithia-3,12-disilatetradecane; Bis(3-trimethoxysilylpropyl) disulfide; Disulfide, bis(3-(trimethoxysilyl)propyl); Si-75 (common trade name); Coupling agent Si-75; TESPD (abbreviation); Bis(trimethoxysilylpropyl) disulfide
EINECS	Contact for details

Quality Control

Our production of 3,3,12,12-Tetramethoxy-2,13-dioxa-7,8-dithia-3,12-disilatetradecane adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against established specifications for purity, identity, and key physical parameters. Certificates of Analysis (COA) documenting these results are provided and 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). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen) to prevent degradation from moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC or HPLC)	≥ 95.0%
Refractive Index (n20/D)	1.465 - 1.475
Density (20°C)	1.08 - 1.12 g/mL

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