Description

2,6-Diphenylhexamethylcyclotetrasiloxane is a specialized organosilicon compound belonging to the class of phenyl-modified cyclic siloxanes. This chemical serves as a critical intermediate and functional additive, valued for its ability to impart unique thermal stability, hydrophobicity, and compatibility into advanced material formulations. It is essential for manufacturers in the silicone polymers, high-performance resins, and specialty coatings industries seeking to enhance product properties.

Application

• As a key monomer or intermediate in the synthesis of high-phenyl content silicone resins and elastomers.
• As a property modifier to improve the thermal stability and oxidative resistance of silicone-based materials.
• As a functional additive in release coatings and pressure-sensitive adhesives to modify surface energy.
• In the formulation of specialty silicone coatings requiring enhanced hydrophobicity and chemical resistance.
• As a precursor for creating tailored siloxane structures used in electronics encapsulation and potting compounds.
• For research and development of novel hybrid organic-inorganic materials and nanocomposites.

Basic Information

Product Name	2,6-Diphenylhexamethylcyclotetrasiloxane
CAS No.	4657-20-9
Molecular Formula	C18H30O4Si4
Molecular Weight	422.80 g/mol
Synonyms	1,3,5,7-Tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane; 2,4,6,8-Tetramethyl-2,4,6,8-tetraphenylcyclotetrasiloxane; D4Ph; Tetramethyltetraphenylcyclotetrasiloxane; Cyclic Phenylmethylsiloxane; Phenyl D4; Octaphenylcyclotetrasiloxane derivative; Methylphenyl cyclotetrasiloxane
EINECS	225-082-5

Quality Control

Our production of 2,6-Diphenylhexamethylcyclotetrasiloxane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including chromatography and spectroscopy, to verify identity and composition. A Certificate of Analysis (COA) detailing all relevant specifications is 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). Keep away from strong oxidizing agents and bases. For long-term storage, consider an inert atmosphere to maintain optimal quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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