Description

1,1,3,3,5-Pentamethyl-5-Phenyltrisiloxane-1,5-Diol is a specialized organosilicon compound featuring a unique hybrid structure with both phenyl and hydroxyl functional groups. This combination provides a versatile chemical intermediate for modifying surface properties and synthesizing advanced silicone polymers. It is particularly valuable for industries requiring materials with tailored hydrophobicity, thermal stability, and reactivity. Key sectors include advanced silicone manufacturing, specialty coatings, and personal care product development.

Application

• Silicone Resin & Polymer Synthesis: Acts as a key building block or chain extender for creating phenyl-modified silicone resins with enhanced thermal and optical properties.
• Surface Treatment & Coatings: Used to formulate hydrophobic and release coatings for industrial and consumer applications.
• Personal Care & Cosmetics: Serves as a functional ingredient in hair care and skincare formulations to provide gloss, conditioning, and film-forming benefits.
• Adhesives & Sealants: Incorporated to improve the flexibility, adhesion, and environmental resistance of high-performance silicone-based adhesives.
• Electronic Encapsulants: Utilized in the synthesis of silicones for potting and encapsulating electronic components due to potential stability advantages.
• Lubricant & Grease Additives: Functions as a performance additive to enhance the thermal stability and load-bearing characteristics of specialty lubricants.

Basic Information

Product Name	1,1,3,3,5-Pentamethyl-5-Phenyltrisiloxane-1,5-Diol
CAS No.	98072-01-6
Molecular Formula	C13H26O4Si3
Molecular Weight	330.60 g/mol
Synonyms	1,1,3,3,5-Pentamethyl-5-phenyl-1,5-dihydroxytrisiloxane; 5-Phenyl-1,1,3,3,5-pentamethyltrisiloxane-1,5-diol; Phenylpentamethyltrisiloxanediol; Trisiloxane-1,5-diol, 1,1,3,3,5-pentamethyl-5-phenyl-; Phenyl-modified trisiloxane diol; Dow Corning® Q1-3563 (potential trade name reference); Silicone diol intermediate
EINECS	Contact for details

Quality Control

Our production of 1,1,3,3,5-Pentamethyl-5-Phenyltrisiloxane-1,5-Diol adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistent performance. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key specifications. Our quality system is designed to meet the demands of GMP and ISO standards for traceability and reliability.

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 sensitive to strong alkali and organic solvents; keep away from incompatible substances. For long-term storage, consider using an inert atmosphere to maintain optimal quality.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Refractive Index (20°C)	1.430 - 1.450
Density (20°C)	1.00 - 1.10 g/cm³

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