Description

1,3-Diphenyl-1,1,3,3-Tetramethyldisiloxane is a high-purity organosilicon compound, widely recognized for its role as a versatile chemical intermediate and functional additive. Its value lies in its unique disiloxane structure, which provides excellent thermal stability and reactivity for modifying material properties. This product is essential for manufacturers in the silicone polymer, pharmaceutical, and advanced materials sectors seeking to enhance product performance and develop innovative formulations.

Application

• Silicone Polymer Modification: Acts as a chain extender, endblocker, or cross-linking agent in the synthesis of specialty silicones, including phenyl-containing silicone fluids, resins, and elastomers.
• Pharmaceutical Intermediates: Serves as a key building block in the synthesis of active pharmaceutical ingredients (APIs) and other complex organic molecules requiring silicon incorporation.
• Adhesives & Sealants: Used to formulate high-performance, thermally stable adhesives and sealants with improved flexibility and environmental resistance.
• Surface Treatment & Coatings: Functions as a surface modifying agent or a precursor for creating hydrophobic, release, or protective coatings on various substrates.
• Lubricant & Grease Additives: Incorporated into synthetic lubricants and greases to enhance thermal-oxidative stability and reduce friction under extreme conditions.
• Research & Development: A valuable reagent in organic and organometallic chemistry research for developing new silicon-based materials and catalysts.

Basic Information

Product Name	1,3-Diphenyl-1,1,3,3-Tetramethyldisiloxane
CAS No.	56-33-7
Molecular Formula	C16H22OSi2
Molecular Weight	286.52 g/mol
Synonyms	Bis(phenyltetramethyldisiloxane); 1,3-Diphenyltetramethyldisiloxane; Tetramethyl-1,3-diphenyldisiloxane; Diphenyltetramethyldisiloxane; Disiloxane, 1,1,3,3-tetramethyl-1,3-diphenyl-; Phenyltetramethyldisiloxane; DPTMDS; 56-33-7
EINECS	200-269-5

Quality Control

Our 1,3-Diphenyl-1,1,3,3-Tetramethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatography (GC/HPLC) and spectroscopic methods, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to guarantee traceability and compliance with your technical requirements.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%

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