Description

Polyphenyl Ether (6 Rings) Os-138 is a high-performance synthetic fluid belonging to the polyphenyl ether family, characterized by its six aromatic rings. This compound is valued for its exceptional thermal stability, low volatility, and resistance to degradation under harsh chemical environments. It is a critical material for demanding applications in the aerospace, electronics, and specialty lubricant industries where extreme conditions are encountered.

Application

• High-Temperature Heat Transfer Fluids and diffusion pump oils in vacuum systems.
• Base Fluid for Specialty Lubricants and greases requiring extreme thermal-oxidative stability.
• Dielectric Coolant in high-power electrical and electronic equipment.
• Aerospace Hydraulic Fluids and sealants for high-performance applications.
• Reaction Medium for high-temperature organic synthesis and polymerization processes.
• Component in Radiation-Resistant Formulations for nuclear and space applications.

Basic Information

Product Name	Polyphenyl Ether (6 Rings) Os-138
CAS No.	56378-65-5
Molecular Formula	C36H30O
Molecular Weight	478.62 g/mol
Synonyms	Hexaphenyl Ether; m-Polyphenyl Ether (6P); 1,1'-[1,1'-Biphenyl]-4,4'-diylbis[oxybis(1,1'-biphenyl-4,2-diyl)]bisoxybenzene; OS-138; Polyphenyl ether fluid; Polyphenylether; PPE (6 rings); Santovac 5 (related trade series); High-temperature polyphenyl ether.
EINECS	Contact for details

Quality Control

Our Polyphenyl Ether (6 Rings) Os-138 is manufactured under stringent quality management systems. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, viscosity, and thermal properties. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee consistency and performance for your critical applications.

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 acids and oxidizing agents. Ensure containers are kept tightly sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Viscosity @ 25°C	Contact for details
Pour Point	Contact for details
Flash Point	> 300 °C
Water Content (KF)	≤ 0.05%

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