Description

1,3,5-Trimethyl-1,3,5-Triphenylcyclotrisiloxane is a high-purity organosilicon compound, specifically a cyclic siloxane trimer, that serves as a critical building block in advanced silicone chemistry. Its unique structure, featuring both methyl and phenyl substituents, provides a balance of reactivity and stability, making it an essential precursor for synthesizing specialty silicone polymers and resins. This product is primarily sought by R&D chemists and manufacturers in the silicone industry, electronics sector, and advanced materials science for developing high-performance coatings, elastomers, and release agents.

Application

• Silicone Polymer Synthesis: A key monomer or intermediate for producing phenyl-containing silicone oils, resins, and high-temperature elastomers.
• Electronic Encapsulants & Potting Compounds: Used to formulate silicones with enhanced thermal stability and dielectric properties for protecting sensitive electronic components.
• High-Performance Release Coatings: Serves as a precursor for silicone release liners used in pressure-sensitive adhesive tapes and labels.
• Specialty Additives & Modifiers: Imparts phenyl groups to silicone systems to improve radiation resistance, refractive index, and compatibility with organic polymers.
• Research & Development: A valuable reagent in academic and industrial labs for exploring new organosilicon chemistry and novel material properties.
• Crosslinking Agent: Functions as a crosslinker in the preparation of silicone networks with specific mechanical and thermal characteristics.

Basic Information

Item	Details
Product Name	1,3,5-Trimethyl-1,3,5-Triphenylcyclotrisiloxane
CAS No.	546-45-2
Molecular Formula	C24H30O3Si3
Molecular Weight	450.77 g/mol
Synonyms	1,3,5-Triphenyl-1,3,5-trimethylcyclotrisiloxane; Cyclotrisiloxane, 1,3,5-trimethyl-1,3,5-triphenyl-; 2,4,6-Trimethyl-2,4,6-triphenylcyclotrisiloxane; Phenylmethylcyclotrisiloxane; Hexaphenylcyclotrisiloxane derivative; D3-Phenyl; Phenyl D3; Contact for additional synonyms.
EINECS	208-900-5

Quality Control

Our production of 1,3,5-Trimethyl-1,3,5-Triphenylcyclotrisiloxane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including GC, HPLC, and NMR to verify identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and impurity profiles is provided with every 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/59-77°F). Due to its hygroscopic nature, the container must be kept tightly sealed to exclude moisture. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or flakes
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 98.0%
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.