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Heat transfer fluids

coracon® heat transfer fluids
Innovative. Effective. Sustainable.

Products for solar systems

coracon® SOL 5: Ecological solar fluid (concentrate)<br/> Environmentally friendly heat transfer fluids and antifreeze for solar systems.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, 2-ethylhexanoic acid
  • Biodegradable, OECD 302 B DOC elimination after 28 days: 99.9%
  • Vaporisation-resistant, no crystallisation
  • Colour: clear, slightly yellowish
  • Antifreeze based on: 1.2-propanediol
  • Specific weight: 1.05g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 7.5–8.5 (ASTM-D 1287)
  • Viscosity at 20°C: 70 mm²/s
  • Heat conductivity at 20°C: 0.22W/m*K
  • Reserve alkalinity: 9.5ml 0.1 HCL at 50% dosing
  • Boiling point (°C): > 150 (ASTM-D 1120)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® SOL 5F: Solar fluid (ready-mix)

Environmentally friendly, ready-to-use heat transfer fluid and antifreeze for solar systems with flat plate collector or vacuum tubes and a minimum frost protection of –28°C.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, 2-ethylhexanoic acid
  • Biodegradable
  • Vaporisation-resistant
  • Colour: clear, stained red
  • Antifreeze based on: 1.2-propanediol
  • Minimum frost protection: –28°C
  • Maximum frost protection: –34°C
  • Refractive index RI: 1.384 ± 0.001
  • Specific weight: 1.040 ± 0.005 g/ml (DIN 51757)
  • pH value: approx. 8.15–8.50 (ASTM-D 1287)
  • Heat conductivity (at 20°C): 0.40 W/m*K
  • Reserve alkalinity: 9.5 ml 0.1 HCL
  • Viscosity at 20°C: 5.8 mm²/s
  • Conductivity: 600µS/cm–650µS/cm
  • Boiling point (°C): > 103 (ASTM-D 1120)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® SOL 5 F -23: Solar fluid (ready-mix)

Environmentally friendly, ready-to-use heat transfer fluid and antifreeze for solar systems with flat plate collector or vacuum tubes and a minimum frost protection of –23°C.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, 2-ethylhexanoic acid
  • Biodegradable
  • Vaporisation-resistant
  • Colour: clear, stained red
  • Antifreeze based on: 1.2-propanediol
  • Minimum frost protection: –23°C
  • Maximum frost protection: –28°C
  • Specific weight: 1.03 g/ml (DIN 51757)
  • pH value: approx. 8.0 (ASTM-D 1287)
  • Heat conductivity (at 20°C): 0.42 W/m*K
  • Reserve alkalinity: 9.5 ml 0.1 HCL
  • Viscosity at 20°C: 5.4 mm²/s
  • Boiling point (°C): > 103 (ASTM-D 1120)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® SOL 5 HF: High-temperature solar fluid

Environmentally friendly and ready-to-use heat transfer fluid and antifreeze for solar systems with vacuum tubes up to a temperature range of approx. 260°C.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, borate, secondary amines, 2-ethylhexanoic acid
  • Biodegradable
  • OECD 302 B DOC elimination after 28 days: 99.9%
  • Vaporisation-resistant, no crystallisation
  • Colour: clear, amber-coloured
  • Minimum frost protection: –24°C
  • Maximum frost protection: –29°C
  • Electric conductivity: approx. 370μS/cm
  • Specific weight: 1.03g/ml (DIN 51757)
  • pH value: 8.1–8.6 (ASTM-D1287)
  • Viscosity at 20°C: 15.0 mm²/s
  • Boiling point (°C): > 102 (ASTM-D1120)
  • Burning point (°C): > 100 (ASTM-D51758)
  • Reserve alkalinity: approx.9.6
  • Refractive index (Brix): 40.6
  • No hazardous good, water hazard class1

Product information as a PDF file

coracon® SOL EKO F: Ecological solar fluid

Heat transfer fluid for solar systems subject to high temperatures.

​​​​​​​Characteristics

  • Free from nitrite, nitrate, phosphate, secondary amines, borate, 2-ethylhexanoic acid
  • Biodegradable
  • Colour: clear, without pigmentation
  • Temperature stability: 214°C
  • Antifreeze based on: 1.3-propanediol
  • Median frost protection: –24°C
  • Specific weight: 1.03 g/ml (DIN 51757)
  • pH value: approx. 8.0 (ASTM-D 1287)
  • Heat conductivity (at 20°C): 0.40 W/m*K
  • Spec. heat capacity (at 20°C): 3.45kJ/(kg*K)
  • Reserve alkalinity: approx. 2ml 0.1 HCL
  • Viscosity at 20°C: 5.8 mm²/s
  • Boiling point (°C): > 103 (ASTM-D 1120)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® SOL EKO: Ecological solar fluid (concentrate)

Heat transfer medium for solar systems subject to higher temperatures; with antifreeze made from renewable raw materials

​​​​​​​Characteristics

  • Free from nitrite, nitrate, phosphate, secondary amines, borate, 2-ethylhexanoic acid
  • Biodegradable
  • Colour: clear, without pigmentation
  • Temperature stability: 214°C
  • Antifreeze based on: 1.3-propanediol
  • Specific weight: 1.05g/ml (DIN 51757)
  • pH value: approx. 8.0 (ASTM-D 1287)
  • Heat conductivity (at 20°C), 50 vol-%: 0.40W/m*K
  • Spec. heat capacity (at 20°C), 50 vol-%: 3.45kJ/(kg*K)
  • Reserve alkalinity: approx. 2ml 0.1 HCL
  • Viscosity at 20°C, 50% dilution: 5.8 mm²/s
  • Boiling point (°C): > 103 (ASTM-D 1120)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • Minimum use concentration: 35 vol-%
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® SOL C: Solar cleaning agent

Ready-to-use cleaning fluid for heat transfer fluids containing glycol.

​​​​​​​Characteristics

  • Colour: nearly colourless
  • Specific weight: 1.05g/ml (DIN 51757)
  • pH value: neutral (ASTM-D1287)
  • Refractive index nD at 20°C: 1.438 (DIN 51423)
  • Viscosity at 20°C: 7–7.5 mm²/s
  • Boiling point (°C): > 240°C (ASTM-D1120)
  • Burning point (°C): approx. 125°C (ASTM-D51758)
  • Ignition temperature: approx. 215°C
  • Vapour pressure: 0.1 mbar
  • Solubility in water: can be mixed
  • No hazardous good, water hazard class1
  • Biodegradability: 100% (31d), easily biodegradable

Product information as a PDF file

Products for geothermal energy

coracon® GEKO AF -8: Ecological heat transfer fluid for near-surface geothermal energy
Ethanol-based heat transfer fluid made from renewable raw materials.

​​​​​​​Characteristics

  • Appearance: clear, liquid stained blue
  • pH value: 7.9–8.5 (ASTM-D 1287)
  • Minimum frost protection: –6°C
  • Maximum frost protection: –8°C
  • Reserve alkalinity: 0.4
  • Self-sustaining combustion as per UN L.2 negative
  • Conductivity (at 20°C): 160μS/cm–180μS/cm
  • Refractive index BRIX/RI: 6.9/1.343±0.005

Product information as a PDF file

coracon® LT EKO F-15: Glykolfreie Kühlsole für Wärmepumpen
Aus nachwachsenden Rohstoffen, ganz ohne Glykol, LAWA-gelistet, 50 % weniger CO2-Emissionen

Kenndaten

  • Nitritfrei, silikatfrei, aminfrei, boratfrei, molybdatfrei, frei von 2-Ethylhexansäure
  • Farbe:   klar, farblos
  • Spezifisches Gewicht (bei T = 20 °C):   1,20 - 1,25 g/ml  (DIN 51757)
  • pH-Wert:   10,3  -  10,8 (ASTM-D 1287)
  • Leitwert LfK :  160000 µS/cm  - 165000 µS/cm
  • Löslichkeit in Wasser:   vollständig
  • Lagerungsstabilität:   mindestens 12 Monate
  • Biostatisch, d.h. neutral gegenüber mikrobiologischer Belastung
  • Typische Dauereinsatzbereiche:   - 15 °C bis + 80 °C.
  • Wassergefährdungsklasse:  WGK1

Produktinformation als PDF

coracon® GEKO AF -15: Ecological heat transfer fluid for near-surface geothermal energy

Ethanol-based heat transfer fluid made from renewable raw materials for borehole heat exchangers or closed heating circuits.

​​​​​​​Characteristics

  • Appearance: clear, liquid stained blue
  • pH value: 7.9–8.5 (ASTM-D 1287)
  • Minimum frost protection: –15°C
  • Reserve alkalinity: 0.4–0.6
  • Self-sustaining combustion as per UN L.2 positive
  • Conductivity (at 20°C): 140μS/cm–190μS/cm
  • Refractive index BRIX/RI: 9.4/1.3468±0.0005

Product information as a PDF file

coracon® GEKO E: Heat transfer fluid for near-surface geothermal energy

Environmentally friendly heat transfer fluid based on 1.3-propanediol for near-surface geothermal energy.

​​​​​​​Characteristics

  • Specific weight at 20°C: 1.055–1.060g/ml (DIN 51757)
  • Appearance: clear, liquid not stained
  • pH value (1:1 with neutr. water): 8.0–8.5 (ASTM-D 1287)
  • Boiling point of concentrate: > 214°C (ASTM-D 1120)
  • Pour point of concentrate: < –15°C
  • Spec. heat capacity in 10% dilution at 25°C: 4.029 J*kg-1*K-1
  • Heat conductivity in 10% dilution at 25°C: 0.575 W/m*K
  • Kinem. viscosity in 10% dilution at 0°C: 13 mm²/s
  • Kinem. viscosity in 10% dilution at 25°C: 3 mm²/s

Product information as a PDF file

coracon® GEKO N: Heat transfer fluid for near-surface geothermal energy

Heat transfer fluid produced on the basis of ethylene glycol for use in borehole heat exchanger systems.

​​​​​​​Characteristics

  • Appearance: clear, liquid stained green
  • pH value (1:1 diluted with water): 7.9–8.5 (ASTM-D1287)
  • Minimum frost protection (10% dilution): –6°C
  • Refractive index: 1.432–1.435
  • Water content: < 2.5%
  • Specific weight at 20°C: 1.10–1.16g/ml (DIN 51757)
  • Boiling point of concentrate: > 180°C (ASTM-D1120)
  • Spec. heat capacity in 10% dilution at 25°C: 4.035kJ*kg-1*K-1
  • Heat conductivity in 10% dilution at 25°C: 0.530W/m*K
  • Kinem. viscosity in 10% dilution at 0°C: 6mm²/s
  • Kinem. viscosity in 10% dilution at 25°C: 2mm²/s
  • Hard water stability: <20°dH

Product information as a PDF file

coracon® GEKO W: Heat transfer fluid for near-surface geothermal energy

Heat transfer fluid for geothermal energy projects in potable water reserves where permits require that only fluids be used that are classified as non-hazardous to water (no-WHC).

​​​​​​​Characteristics

  • Ready-mix
  • No frost protection
  • Protection against corrosion, silting and deposits
  • Can stabilise the pH value
  • Long shelf life
  • Very good heat transfer
  • Free from nitrite, phosphate, secondary amines, borate, zinc, 2-ethylhexanoic acid
  • Anticorrosive based on OAT (Organic Acid Type)
  • Biodegradable
  • Colour: clear, not stained (can be customised)
  • Viscosity at 20°C 1.02mPa.s
  • Specific weight: 1.01g/ml (DIN 51757)
  • pH value: approx. 8.5 (ASTM-D 1287)
  • Electr. conductivity: 500–600μS/cm

Product information as a PDF file

coracon® KS 6: Ecological heat transfer fluid for geothermal energy

Heat transfer fluid produced on the basis of ethylene glycol for use in borehole heat exchanger systems.

​​​​​​​Characteristics

  • Appearance: clear fluid, stained green
  • pH value (1:1 diluted with water): 7.9–8.5 (ASTM-D 1287)
  • Refractive index: 1.432–1.435
  • Specific weight at 20°C: 1.11–1.12g/ml (DIN 51757)
  • Boiling point of concentrate: > 180°C (ASTM-D 1120)
  • Hard water stability < 20°dH
  • Minimum concentration: should be greater than 25 vol-%

Product information as a PDF file

Products for industrial and building technology

coracon® WT AF -8: Heat transfer fluid for cooling circuits near food

Environmentally friendly heat transfer fluid made from 100% plant-based eco-ethanol; can be used in circuits near food.

​​​​​​​Characteristics

  • Appearance: clear, liquid stained blue
  • pH value: 7.9–8.5 (ASTM-D1287)
  • Minimum frost protection: –6°C
  • Maximum frost protection: –8°C
  • Reserve alkalinity: 0.4
  • No sustained combustibility up to 60°
  • Conductivity (at 20°C): 160μS/cm–180μS/cm
  • Refractive index BRIX/RI 6.9/1.343

Product information as a PDF file

coracon® LT EKO F-30: Glykolfrei und aus nachwachsenden Rohstoffen
Glykolfreie, umweltfreundliche Wärmeträgerflüssigkeit für Tieftemperaturanwendungen in lebensmittelnahen Bereichen, NSF-listed, kosher-zertifiziert.

Kenndaten

  • Nitritfrei, silikatfrei, aminfrei, boratfrei, molybdatfrei, frei von 2-Ethylhexansäure
  • Farbe:   klar, farblos
  • spezifisches Gewicht (bei T = 20 °C):   1,20 - 1,25 g/ml  (DIN 51757)
  • pH-Wert:   10,3  -  10,8 (ASTM-D 1287)
  • Leitwert LfK :  160000 µS/cm  - 165000 µS/cm
  • Löslichkeit in Wasser:   vollständig
  • Lagerungsstabilität:   mindestens 12 Monate
  • biostatisch, d.h. neutral gegenüber mikrobiologischer Belastung
  • Typische Dauereinsatzbereiche:   - 30 °C bis + 80 °C
  • Wassergefährdungsklasse:  WGK1

Produktinformation als PDF

coracon® WT EKO F -20: Ecological heat transfer fluid

Long-term antifreeze and anticorrosive ready-mix for use as a heat transfer fluid in building technology and cooling systems. Minimum frost protection of –20°C.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, amines, borate, 2-ethylhexanoic acid
  • Biodegradable
  • Colour: clear, slightly ochre liquid
  • Temperature stability: 214°C
  • Minimum frost protection: –20°C
  • Antifreeze based on: 1.3-propanediol
  • Specific weight: 1.04 g/ml (DIN 51757)
  • pH value: 7.5–8.5 (ASTM-D 1287)
  • Boiling point (°C): > 103 (ASTM-D 1120)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® WT KF: Heat transfer fluid for low-temperature applications

For low-temperature applications in areas near food, containing a potassium formate solution with special corrosion inhibitors.

​​​​​​​Characteristics

  • Free from nitrite, silicate, secondary amines, borate, molybdate, 2-ethylhexanoic acid
  • Colour: clear, colourless
  • Specific weight (at 20°C): 1.17–1.32g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 11.3–11.9 (ASTM-D1287)
  • Conductance (conductivity): 250000μS/cm–264000μS/cm
  • Solubility in water: complete
  • No hard water stability
  • Storage stability: at least 12 months

Product information as a PDF file

coracon® WT 6N: Heat transfer fluid for building technology

Environmentally friendly and innoxious heat transfer fluid and antifreeze based on ethylene glycol; for closed circuits.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, zinc, 2-ethylhexanoic acid
  • Colour: clear, stained green
  • Antifreeze based on: Ethylene glycol
  • Biodegradable
  • Specific weight: 1.11g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 8.0–8.5 (ASTM-D1287)
  • Cond. (1:1 with VE water): 430μS/cm
  • RI/refractive index: 1.4273
  • Boiling point (°C): > 150 (ASTM-D1120)
  • Burning point (°C): > 100 (ASTM-D51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® WT 6N F -20: Heat transfer fluid for building technology

Environmentally friendly heat transfer fluid and antifreeze based on ethylene glycol with a minimum frost protection of –20°C.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, zinc, 2-ethylhexanoic acid
  • Colour: clear, stained green
  • Antifreeze based on: Ethylene glycol
  • Biodegradable
  • Specific weight: 1.05g/ml (DIN 51757)
  • pH value (1:1 with VE water): 8.0–8.2 (ASTM-D1287)
  • Cond.: 42 9μS/cm
  • RI/refractive index: 1.3685
  • Boiling point (°C): > 150 (ASTM-D1120)
  • Burning point (°C): > 100 (ASTM-D51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

 

coracon® WT 6N F -25: Heat transfer fluid for building technology

Environmentally friendly heat transfer fluid and antifreeze based on ethylene glycol with a minimum frost protection of –25°C.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, zinc, 2-ethylhexanoic acid
  • Colour: clear, stained green
  • Antifreeze based on: Ethylene glycol
  • Biodegradable
  • Specific weight: 1.045g/ml–1.055g/ml (DIN 51757)
  • pH value: 8.0–8.3 (ASTM-D 1287)
  • Cond.: 475μS/cm–550μS/cm
  • RI/refractive index: 1.3752
  • Boiling point (°C): > 150 (ASTM-D 1120)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® WT 6P: Heat transfer fluid for building technology

Environmentally friendly and innoxious heat transfer fluid and antifreeze based on propylene glycol; for closed circuits.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, zinc, 2-ethylhexanoic acid
  • Colour: clear, stained blue
  • Antifreeze based on: 1.2-propylene-glycol
  • Biodegradable
  • Specific weight: 1.04g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 7.5–8.5 (ASTM-D1287)
  • Boiling point (°C): > 150 (ASTM-D1120)
  • Burning point (°C): > 100 (ASTM-D51758)
  • No hazardous good, water hazard class 1

Product information as a PDF file

coracon® GEKO W: no-WHC heat transfer fluid for near-surface geothermal energy

Heat transfer fluid for geothermal energy projects in potable water reserves where only fluids non-hazardous to water (no-WHC) can be used.

​​​​​​​Characteristics

  • Free from nitrite, silicate, secondary amines, borate, molybdate, 2-ethylhexanoic acid
  • Colour: clear, colourless
  • Specific weight (at 20°C): 1.17–1.32g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 11.3–11.9 (ASTM-D1287)
  • Conductance (conductivity): 250000μS/cm–264000μS/cm
  • Solubility in water: complete
  • No hard water stability
  • Storage stability: at least 12 months

Product information as a PDF file

Super concentrates

coracon® SK 10: Super concentrate for potassium formates

Highly concentrated inhibitor for low-temperature brines based on potassium formates for use in technical and near-food cooling circuits.

​​​​​​​Characteristics

  • Free from nitrite, silicate, secondary amines, borate, molybdate, 2-ethylhexanoic acid
  • Colour: clear, slightly yellowish
  • Specific weight (at 20°C): 1.15–1.20g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 10.5–11.5 (ASTM-D1287)
  • Solubility in water: complete
  • No hard water stability
  • No hazardous good, water hazard class1
  • Storage stability: at least 12 months

Product information as a PDF file

coracon® SK 12: Super concentrate for heat transfer fluids containing glycol

Highly concentrated inhibitor for heat transfer fluids and antifreeze such as cooling brine fluids or fluids in building industry.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, molybdate, 2-ethylhexanoic acid
  • Colour: clear, slightly yellowish
  • Specific weight (at 20°C): 1.08–1.12g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): approx. 8.5 (ASTM-D 1287)
  • Solubility in water: complete
  • Hard water stability: yes
  • No hazardous good, water hazard class: 1
  • Storage stability: at least 12 months

Product information as a PDF file

coracon® SOL K6 HT: Super concentrate for systems subject to very high temperatures

Highly concentrated inhibitor for heat transfer fluids and antifreeze, in particular in solar systems subject to very high temperatures.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, zinc, silicate, molybdate, 2-ethylhexanoic acid
  • Biodegradable
  • Can stabilise the pH value and disperses easily
  • Colour: clear, ochre
  • Specific weight: 1.1–1.2g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): approx. 8.5 (ASTM-D 1287)
  • Burning point (°C): > 100 (ASTM-D 51758)
  • No hazardous good, no hazardous substance, water hazard class 1
  • Vaporisation-resistant (no crystallisation)
  • Temperature-stable up to approx. 260°C

Product information as a PDF file

coracon® SOL K6: Super concentrate

Inhibitor free from molybdenum, for heat transfer fluids and antifreeze such as solar fluids and cooling brine fluids.

​​​​​​​Characteristics

  • Free from nitrite, phosphate, secondary amines, borate, molybdate, 2-ethylhexanoic acid
  • Biodegradable
  • Can stabilise the pH value and disperses easily
  • Colour: clear, slightly yellowish
  • Reserve alkalinity in 6% preparation: 8ml 0.1 HCL
  • Specific weight: 1.11g/ml (DIN 51757)
  • pH value (1:1 with neutr. water): 8.5–9.5 (ASTM-D1287)
  • No hazardous good, water hazard class 1
  • Vaporisation-resistant (no crystallisation)
  • Temperature-stable up to approx. 220°C

Product information as a PDF file

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Service Center

We can help quickly and competently.

Your contact: 
Ronald Klukas
Head of Heat Transfer Fluids Competence Center
Phone: +49 89 899 369 12
E-mail: r.klukasaqua-concept-gmbh.eu