Coolant with Corrosion, Scale, and Biological Inhibitors

  • Ready-to-Use, Pre-Diluted Non-Toxic Solution
  • Prevents Corrosion and Fouling
  • Frost Protection Down to -15 °C
  • Available in 5 L Containers


Coolflow DTX Coolant, 5 L

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Frost Protection -15 °C 
Recommended Operating Temperature Rangea -10 to 85 °C 
Refractive Index 1.362
Kinematic Viscosity @ 20 °C 2.3635 mm2/sec
Specific Heat @ 20 °C 3.7910 kJ/(kg·K)
Thermal Conductivity @ 20 °C 0.4794 W/(m·K)
  • This is the temperature range for continuous operation. Coolflow DTX can support brief temperature fluctuations up to 95 °C

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Container May Be Blue or Clear


  • Ready to Use Ethylene Glycol-Based Antifreeze
  • Protects Against Corrosion and Biological Growth
  • Colored Solution for Easy Leak Detection
  • Non-Toxic to Humans and Animals

Thorlabs offers non-toxic Coolflow DTX Refrigerant Antifreeze with Corrosion, Scale, and Biological Inhibitors for use with chillers. Made with ethylene glycol, this pre-diluted coolant features more efficient heat transfer characteristics than alternatives based on propylene glycol, such as lower dynamic viscosity and higher thermal conductivity; see the Specifications table for more details. Though ethylene glycol is usually toxic, Coolflow DTX contains the additive DeTox®†, which makes the solution non-harmful to humans and animals if accidentally ingested. More information regarding material safety can be found in the MSDS sheet here.

To promote a long operational lifetime, Coolflow DTX includes inhibiters to suppress the chemical reactions that cause galvanic corrosion, which is an electrochemical process occurring when two dissimilar metals are electrically connected and immersed in an electrolyte. This coolant also features scale and biological inhibitors to prevent fouling and algae bloom to maintain high thermal efficiencies.

Coolflow DTX has a viscosity low enough to not greatly effect pump motor efficiencies, making it ideal for use with a wide variety of chillers and other equipment that needs to be cooled. Offered in five liter quantities, the Coolflow DTX solution is pre-diluted with UltraPure water to a concentration of 28.0%. The solution at this concentration has frost protection down to -15 °C; however, we recommend a minimum operating temperature of -10 °C to reduce the risk of the temperature dropping below the frost protection value. Coolflow DTX supports a maximum constant operating temperature of 85 °C, as well as instantaneous temperature fluctuations up to 95 °C. It has a shelf life of three years when stored in a sealed container below 40 °C out of direct sunlight.

DeTox® is a registered trademark of Evans Cooling Systems, Inc.

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Refrigerant Antifreeze

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CDTXCustomer Inspired! Refrigerant Antifreeze with Corrosion, Scale, and Biological Inhibitors, 5 L