Description

1,3-Di(p-Tolyl)-1,1,3,3-Tetramethyldisiloxane, 97% is a high-purity organosilicon compound featuring a disiloxane backbone symmetrically substituted with p-tolyl and methyl groups. This specific molecular architecture makes it a valuable synthetic intermediate and functional monomer in advanced material science. It is primarily sought after by R&D and production teams in the specialty silicone, polymer modification, and pharmaceutical chemistry sectors for its role in introducing specific organic functionalities into siloxane systems.

Application

• Silicone Polymer Modification: Acts as a chain extender or functional terminator in the synthesis of specialty polydimethylsiloxanes (PDMS) and copolymers, imparting specific thermal and solubility properties.
• Coupling Agent/Crosslinker: Used in the formulation of silicone resins, adhesives, and sealants to enhance compatibility with organic matrices and control crosslink density.
• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of complex molecules for drug discovery and development, leveraging its silicon-based functional groups.
• Surface Modification Reagent: Employed to functionalize silica, glass, or other inorganic surfaces with organic tolyl groups for improved hydrophobicity or specific chemical reactivity.
• Liquid Crystal & OLED Material Precursor: Utilized in the research and production of advanced electronic materials where its stable siloxane core and aromatic groups are beneficial.
• Catalyst & Ligand Synthesis: Functions as a precursor for creating specialized ligands in organometallic chemistry and catalysis.

Basic Information

Product Name	1,3-Di(p-Tolyl)-1,1,3,3-Tetramethyldisiloxane, 97%
CAS No.	18055-70-4
Molecular Formula	C20H30OSi2
Molecular Weight	342.63 g/mol
Synonyms	1,3-Bis(4-methylphenyl)-1,1,3,3-tetramethyldisiloxane; Bis(4-methylphenyl)tetramethyldisiloxane; p-Tolyltetramethyldisiloxane; 1,3-Di-p-tolyltetramethyldisiloxane; Tetramethyl-di-p-tolyldisiloxane; Disiloxane, 1,3-bis(4-methylphenyl)-1,1,3,3-tetramethyl-; Di(p-tolyl)tetramethyldisiloxane
EINECS	Contact for details

Quality Control

Our 1,3-Di(p-Tolyl)-1,1,3,3-Tetramethyldisiloxane is manufactured under strict quality management protocols. Every batch undergoes rigorous analytical testing to ensure it meets the declared 97% minimum purity and consistent performance. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment 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). Keep away from strong oxidizing agents, strong acids, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.1%

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