Description

1,1,5,5-Tetramethyl-3,3-Diphenyltrisiloxane is a specialized organosilicon compound featuring a unique trisiloxane backbone with phenyl and methyl substituents. This structure provides a valuable combination of thermal stability, hydrophobicity, and compatibility with organic polymers, making it a versatile intermediate and functional additive. It is primarily utilized by manufacturers in the silicone industry, personal care sector, and advanced materials research for developing high-performance lubricants, release agents, and modified polymers.

Application

• Silicone Intermediate: A key building block for synthesizing custom silicone oils, resins, and elastomers with phenyl-modified properties.
• Lubricant & Release Agent Formulation: Used as a base or additive in high-temperature lubricants and mold release agents due to its excellent thermal stability and low surface tension.
• Personal Care Ingredients: Serves as a precursor for silicone conditioning agents in hair care and skincare products, providing gloss and softness.
• Polymer Modification: Acts as a crosslinker or modifier to enhance the heat resistance, flexibility, and water repellency of organic polymers.
• Adhesive & Sealant Additive: Incorporated to improve the flow, adhesion, and environmental durability of silicone-based adhesives and sealants.
• Surface Treatment Agent: Utilized to create hydrophobic and oleophobic coatings on glass, metals, and textiles.
• Research & Development: Employed in academic and industrial R&D for exploring new organosilicon chemistry and material science applications.

Basic Information

Product Name	1,1,5,5-Tetramethyl-3,3-Diphenyltrisiloxane
CAS No.	17875-55-7
Molecular Formula	C22H32O2Si3
Molecular Weight	424.76 g/mol
Synonyms	Trisiloxane, 1,1,5,5-tetramethyl-3,3-diphenyl-; 1,3-Diphenyl-1,1,3,3-tetramethyltrisiloxane; 3,3-Diphenyl-1,1,5,5-tetramethyltrisiloxane; Diphenyltetramethyltrisiloxane; Phenyl Modified Trisiloxane; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards and batch-to-batch consistency. Quality is verified through analytical methods including Gas Chromatography (GC) and Infrared Spectroscopy (IR) to confirm identity and purity. Certificates of Analysis (COA) detailing specific lot results are available upon request to support your quality assurance protocols.

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 moisture to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 95.0%
Density (at 20°C)	~1.00 g/cm³
Refractive Index (n20D)	~1.480

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