Description

1,3-Diphenyl-1,3-Dimethyldisiloxane is a versatile organosilicon compound that serves as a key intermediate and functional material in advanced manufacturing. Its value lies in its unique siloxane backbone with phenyl and methyl substituents, offering a balance of reactivity, thermal stability, and compatibility with organic polymers. This product is essential for R&D chemists and process engineers in the silicone, polymer, and specialty chemical industries seeking to develop high-performance materials.

Application

• Silicone Polymer Intermediate: Acts as a monomer or chain extender in the synthesis of specialty polysiloxanes and silicone resins.
• Coupling Agent/Crosslinker: Used to modify surface properties or create cross-linked networks in polymer composites and coatings.
• Pharmaceutical & Agrochemical Synthesis: Serves as a protected silanol equivalent or building block in the synthesis of complex organic molecules.
• Adhesive & Sealant Formulations: Imparts specific rheological and adhesion properties to high-performance silicone-based adhesives.
• Research & Development: A valuable reagent for exploring new organosilicon chemistry, material science, and catalysis.
• Lubricant & Release Agent Additive: Used as a component in formulations requiring thermal stability and low surface energy.

Basic Information

Product Name	1,3-Diphenyl-1,3-Dimethyldisiloxane
CAS No.	6689-22-1
Molecular Formula	C14H18OSi2
Molecular Weight	258.46 g/mol
Synonyms	1,3-Dimethyl-1,3-diphenyldisiloxane; Diphenyldimethyldisiloxane; Disiloxane, 1,3-dimethyl-1,3-diphenyl-; 1,1,3,3-Tetramethyl-1,3-diphenyldisiloxane (common naming); Tetramethyldiphenyldisiloxane; DPDMS; TMDPDS; Bis(dimethylphenylsilyl) ether
EINECS	229-729-5

Quality Control

Our 1,3-Diphenyl-1,3-Dimethyldisiloxane is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing specific results for purity, water content, and other critical parameters are provided with every shipment to support your quality assurance and regulatory compliance needs.

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 hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent degradation from atmospheric moisture. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.520 - 1.530
Density (20°C)	1.00 - 1.05 g/mL

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