Description

3,3'-[1,1,3,3-Tetramethylpropanedisiloxane-1,3-Diyl]Bis(1-Propanethiol) is a specialized organosilicon compound featuring a central disiloxane bridge flanked by thiol-terminated propyl chains. This unique bifunctional structure makes it a valuable cross-linking agent and surface modifier in advanced material synthesis. It is primarily sought after by R&D and production teams in the silicone elastomer, adhesive, and coatings industries for its ability to introduce sulfur-based reactivity into polymer networks.

Application

• Cross-linking agent for the synthesis of specialty silicone rubbers and high-performance elastomers.
• Surface modification reagent for nanoparticles (e.g., gold, silver) to impart stable organic functionalization.
• Key intermediate in the production of adhesives and sealants with enhanced thermal and chemical resistance.
• Building block for functionalized polysiloxanes used in release coatings and pressure-sensitive adhesives.
• Ligand precursor in catalyst design and organometallic chemistry applications.
• Modifier for composite materials, improving the interface between inorganic fillers and organic polymer matrices.

Basic Information

Product Name	3,3'-[1,1,3,3-Tetramethylpropanedisiloxane-1,3-Diyl]Bis(1-Propanethiol)
CAS No.	18001-52-0
Molecular Formula	C14H34O2S2Si2
Molecular Weight	354.71 g/mol
Synonyms	1,3-Bis(3-mercaptopropyl)tetramethyldisiloxane; Bis(3-mercaptopropyl)tetramethyldisiloxane; 3,3'-(Tetramethyldisiloxane-1,3-diyl)di-1-propanethiol; 1,1,3,3-Tetramethyl-1,3-bis(3-mercaptopropyl)disiloxane; Tetramethylbis(3-mercaptopropyl)disiloxane; Disiloxane, 1,3-bis(3-mercaptopropyl)-1,1,3,3-tetramethyl-; Mercaptopropyl-terminated polydimethylsiloxane (low MW example)
EINECS	Contact for details

Quality Control

Our production of 3,3'-[1,1,3,3-Tetramethylpropanedisiloxane-1,3-Diyl]Bis(1-Propanethiol) adheres to strict quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key specifications are provided to guarantee traceability and compliance with your material requirements.

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 moisture-sensitive (hygroscopic) and should be kept under an inert atmosphere (e.g., nitrogen) for long-term storage to prevent oxidation of the thiol groups. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or Titration)	≥ 95.0%
Thiol Content	Contact for details
Refractive Index (n20D)	Contact for details
Density (g/mL, 20°C)	Contact for details

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