Eastman Therminol® heat transfer fluids are specially formulated for efficient, indirect process heat transfer across a wide range of system types, from single to multistation setups. Engineered for superior thermal stability, these fluids maintain consistent performance within their designed temperature ranges, delivering reliable, long-term operation with minimal maintenance and downtime.
Therminol is available in multiple formulations and temperature ranges, offering cost savings, low maintenance and precise temperature control. Find the right Therminol fluid for your application with expert guidance to ensure regulatory compliance.
Use the following diagram and temperature-range guides to explore each fluid’s benefits, availability, safety data and technical specifications.
*Denotes a Marlotherm product
Therminol 54 heat transfer fluid
Therminol 54 is a synthetic fluid designed for reliable heat transfer at bulk temperatures up to 280°C (540°F). Ideal for nonpressurized or low-pressure indirect heating systems, it provides efficient process heat without the need for high pressures.
Therminol 55 heat transfer fluid
Therminol 55 is a synthetic heat transfer fluid designed for moderate-temperature applications in nonpressurized or low-pressure indirect heating systems. It provides efficient and dependable uniform process heat without the need for high pressures.
Therminol 59 heat transfer fluid
Therminol 59 is a synthetic heat transfer fluid known for its excellent low-temperature pumping characteristics and thermal stability. It is ideally suited for combination heating and cooling applications, providing effective heat transfer rates even at temperatures as low as 20°C (70°F).
Therminol 62 heat transfer fluid
Therminol 62 is a synthetic heat transfer fluid designed with custom chemistry for high performance, purity and low pressure, offering exceptional thermal stability. It is specifically engineered to resist solids formation and prevent system fouling.
Therminol 66 heat transfer fluid
Therminol 66 is a high-temperature, liquid-phase heat transfer fluid that remains pumpable at low temperatures and offers exceptional thermal stability. It is specifically engineered to resist solids formation and system fouling, ensuring improved reliability and potential cost savings.
Therminol 68 heat transfer fluid
Therminol 68 is a high-temperature liquid-phase heat transfer fluid that operates effectively at temperatures up to 360°C (680°F). It features excellent thermal stability and a boiling point of 308°C (586°F), requiring about 2 bar of static pressure to maintain the liquid phase at elevated temperatures.
Therminol 72 heat transfer fluid
Therminol 72 is an ultrahigh-temperature, liquid-phase heat transfer fluid designed for exceptional thermal stability, suitable for use at temperatures up to 380°C (720°F). It minimizes the formation of low boilers and eliminates the risk of insoluble high-boiler formation and fouling.
Therminol 75 heat transfer fluid
Therminol 75 is a synthetic, ultrahigh-temperature, liquid-phase heat transfer fluid known for its excellent thermal stability. It delivers a heat transfer coefficient that is equivalent to or higher than that of other natural or synthetic liquids within the same boiling range.
Therminol SP heat transfer fluid
Therminol SP is a synthetic heat transfer fluid for moderate-temperature applications in nonpressurized or low-pressure indirect heating systems. It offers efficient, uniform process heat without high pressures and resists oxidation ten times better than mineral oils.
Therminol VP-1 heat transfer fluid
Therminol VP-1 is a synthetic heat transfer fluid composed of diphenyl oxide (DPO) and biphenyl designed for ultrahigh temperatures. It offers exceptional thermal stability and low viscosity, ensuring reliable performance in vapor- and liquid-phase systems from 12° to 400°C (54° to 750°F).
Therminol VP-3 heat transfer fluid
Therminol VP-3 is a synthetic heat transfer fluid for vapor-phase applications at lower temperatures than traditional DPO/biphenyl fluids like Therminol VP-1. It’s easy to handle with little odor.
Therminol D-12 heat transfer fluid
Therminol D-12 is a synthetic, liquid-phase heat transfer fluid that efficiently provides heating and cooling across a broad temperature range. It features a low odor and has an excellent toxicity profile.
Therminol LT heat transfer fluid
Therminol LT is a synthetic aromatic heat transfer fluid effective in both liquid- and vapor-phase applications. It has excellent heat transfer properties, and its low viscosity makes it ideal for extreme cooling at low temperatures.
Therminol XP heat transfer fluid
Therminol XP is an extremely pure, environmentally friendly mineral oil designed for reliable heat transfer. It meets FDA purity standards and minimizes fouling while ensuring long-term thermal stability at continuous temperatures up to 315°C (600°F).
Therminol ADX-10 heat transfer fluid
Therminol ADX-10 is a low-viscosity, synthetic organic heat transfer fluid particularly recommended for indirect liquid-phase process heating at medium temperatures. Its low-temperature properties eliminate the need for steam or other heat tracing methods.
Therminol FF flushing fluid
Therminol FF is the first synthetic flushing fluid for liquid-phase heat transfer systems, providing a quicker alternative to chemical cleaning. Drain the old fluid, add Therminol FF, circulate and refill with new heat transfer fluid to clean fouled systems effectively.