Description

Phenyl Ether-Biphenyl Eutectic CAS NO 8004-13-5 is a high-temperature, low-vapor-pressure heat transfer fluid composed of a specific eutectic mixture of diphenyl oxide and biphenyl. This product matters for its exceptional thermal stability and efficient energy transfer capabilities in demanding industrial processes. It is primarily needed by manufacturers in the chemical, pharmaceutical, and renewable energy sectors for precise temperature control in heat transfer systems, vapor-phase heating, and as a working fluid in organic Rankine cycles.

Application

• Primary working fluid in high-temperature liquid-phase and vapor-phase heat transfer systems (HTF).
• Thermal management medium for reactors, distillation columns, and other process equipment in chemical manufacturing.
• Heat transfer fluid in concentrating solar power (CSP) plants and other renewable energy applications.
• Temperature control fluid in pharmaceutical and fine chemical synthesis requiring uniform, high-temperature heating.
• Industrial heating applications where low vapor pressure at high temperatures is critical for safety and system design.
• Heat storage and transfer medium in thermal energy storage systems.

Basic Information

Product Name	Phenyl Ether-Biphenyl Eutectic
CAS No.	8004-13-5
Molecular Formula	Mixture (C12H10O • C12H10)
Molecular Weight	N/A (Eutectic Mixture)
Synonyms	Diphenyl Oxide-Biphenyl Eutectic; Dowtherm A (Typical Trade Name); Eutectic Heat Transfer Fluid; Biphenyl/Diphenyl Ether Mixture; Phenyl Ether and Biphenyl Mixture; High Temperature Heat Transfer Fluid; Therminol VP-1 (Typical Trade Name); Solar Salt HTF
EINECS	Contact for details

Quality Control

Our Phenyl Ether-Biphenyl Eutectic is produced and tested to meet stringent specifications for high-temperature thermal fluids. Quality is assured through batch-level analysis of key parameters including composition, boiling range, flash point, and thermal stability. Certificates of Analysis (COA) documenting purity and performance characteristics are available for every shipment to ensure compliance with your process requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizing agents. The optimal storage temperature is between 15°C and 25°C (59°F and 77°F). Keep containers tightly sealed when not in use to prevent contamination and minimize moisture absorption.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to standard
Composition (GC)	Eutectic mixture of Diphenyl Oxide and Biphenyl
Boiling Range	~257°C
Flash Point (COC)	>110°C
Pour Point	< 12°C
Water Content (KF)	< 0.05%
Thermal Stability Test	Pass

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