Description

1,3-Dichloro-1,3-Dimethyl-1,3-Diphenyldisiloxane is a versatile organosilicon intermediate of significant commercial importance. This compound serves as a key building block in the synthesis of advanced silicone polymers and functional siloxane materials. It is essential for manufacturers in the silicone elastomer, specialty resin, and advanced materials sectors seeking to introduce specific phenyl and reactive chloro functionalities into their products.

Application

• Silicone Polymer Synthesis: A crucial monomer or chain extender for producing phenyl-methyl polysiloxanes with enhanced thermal stability and optical clarity.
• High-Performance Elastomers: Used in the formulation of specialty silicone rubbers for demanding applications in aerospace, automotive, and electronics.
• Hybrid Material Fabrication: Acts as a coupling agent or precursor in the development of organic-inorganic hybrid (OIH) materials and sol-gel coatings.
• Surface Modification: Employed to impart hydrophobic or specific functional properties to silica, glass, and other inorganic surfaces.
• Pharmaceutical & Cosmetic Intermediates: Serves as a synthetic intermediate for siloxane-based ingredients where specific phenyl substitution is required.
• Adhesive & Sealant Formulations: Incorporated to modify the properties of silicone-based adhesives and sealants, improving flexibility and chemical resistance.

Basic Information

Item	Detail
Product Name	1,3-Dichloro-1,3-Dimethyl-1,3-Diphenyldisiloxane
CAS No.	3582-72-7
Molecular Formula	C14H16Cl2OSi2
Molecular Weight	327.35 g/mol
Synonyms	1,3-Dichloro-1,1,3,3-tetraphenyldisiloxane (common misnomer); Dichlorodiphenyldimethyldisiloxane; Bis(chlorodimethylsilyloxy)diphenylsilane; 1,3-Dichloro-1,3-dimethyl-1,3-diphenyldisiloxane; Diphenyldimethyldichlorodisiloxane; DCDMDPDS; (Chlorodimethylsilyloxy)diphenylchlorosilane; 1,1,3,3-Tetraphenyl-1,3-dichlorodisiloxane (isomeric reference)
EINECS	Contact for details

Quality Control

Our 1,3-Dichloro-1,3-Dimethyl-1,3-Diphenyldisiloxane is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including GC, NMR, and titration methods, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles 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). This material is hygroscopic (moisture-sensitive) and reacts with strong acids and bases; ensure containers are sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to maintain product integrity. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Chlorine Content (Titration)	21.5 - 22.5 %
Density (at 20°C)	1.15 - 1.20 g/cm³
Refractive Index (n20D)	1.540 - 1.550

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