In the field of fire safety, finding a fire extinguishing agent that can effectively extinguish fires, is environmentally friendly, and safe for equipment and human health has always been a core proposition in the industry. The emergence of perfluorohexane provides an almost perfect answer to this question.
Perfluorohexane (chemical name: dodecfluoro-2-methyl-3-pentanone, CAS number 756-13-8, code FK-5-1-12) is a transparent, colorless, and odorless liquid. It was first developed and introduced to the market by 3M Company in the United States, with the product name Novec ™ 1230 is currently recognized globally as a new generation of clean fire extinguishing agent. Thanks to its excellent comprehensive performance, perfluorohexane is gradually becoming an ideal alternative to traditional fire extinguishing agents such as Halons and Heptafluoropropane
Physical and chemical properties: Born for efficient fire extinguishing
The unique physical and chemical properties of perfluorohexane are the basis for its excellent fire extinguishing performance:
Room temperature liquid, convenient storage: Perfluorohexane has a boiling point of about 49 ° C and is in a liquid state at room temperature. This means that it can be stored and transported in atmospheric or low-pressure containers like regular liquids, significantly reducing storage and transportation costs and risks.
Excellent electrical insulation: There are no freely moving charged ions in perfluorohexane liquid, which has excellent insulation performance. Experiments have shown that even at a voltage of 220 volts, perfluorohexane can remain stable. Therefore, it can be directly used to extinguish fires of live equipment without causing short circuits or equipment damage.
Rapid vaporization, efficient heat absorption: The vaporization heat of perfluorohexane is 1/25 of water, and the vapor pressure is 12 times that of water. Once in contact with flames or high-temperature surfaces, it will quickly vaporize, absorb a large amount of heat, and achieve efficient cooling.
Environmental Performance: Truly ‘Green’ Fire Extinguishing Agent
The most prominent advantage of perfluorohexane is its excellent environmental performance, which completely solves the environmental problems that plague traditional fire extinguishing agents:
The ozone depletion potential (ODP) is 0: it has no destructive effect on the atmospheric ozone layer.
Global Warming Potential (GWP)<1: much lower than the GWP value of about 3500 for heptafluoropropane, equivalent to carbon dioxide.
Extremely short atmospheric residence time: only 0.014 years (about 5 days). This means that once perfluorohexane is released into the environment, it will rapidly decompose and will not have a long-term impact on the global climate.
Therefore, perfluorohexane has been praised by CCTV as a “black technology” that leverages new quality productivity, and is a new generation of compounds that replace high GWP fire extinguishing agents such as Halon 1301 and HFC-227ea.
Fire extinguishing mechanism: synergy of chemical inhibition and physical cooling
Perfluorohexane achieves efficient fire extinguishing through dual chemical and physical interactions:
Chemical inhibition: Similar to clean gas fire extinguishing agents such as heptafluoropropane, perfluorohexane can capture free radicals (H ·, OH ·) in the combustion chain reaction, interrupting the chain transfer process of combustion.
Phase change cooling (core advantage): Unlike heptafluoropropane, which vaporizes and absorbs heat instantly at the nozzle, perfluorohexane is sprayed onto the fire in the form of fine droplets, and only undergoes intense vaporization upon contact with flames or high-temperature surfaces, producing a strong local cooling effect. This’ targeted phase change cooling ‘has stronger capabilities and theoretical advantages in extinguishing deep-seated fires and suppressing reignition.
The fire extinguishing design concentration is lower: the fire extinguishing design concentration of perfluorohexane is usually between 4% -6%, which is lower than the 7% -10% of heptafluoropropane. Less medication is required to achieve the same fire extinguishing effect, and the system is more compact.
Widely used: guarding critical facilities and precious assets
With the comprehensive advantages of high efficiency, environmental protection, insulation, and no residue, the perfluorohexane fire extinguishing system has been widely used in multiple key fields:
Power and energy systems: power plants, substations, transformers, cable trenches, distribution rooms, charging stations, wind power equipment, etc.
Data center and communication facilities: precision equipment venues such as data centers, communication centers, monitoring and command centers.
Cultural heritage and archive protection: Rare cultural relics and materials collection places such as museums, libraries, and archives.
Transportation: ships, rail transit, aviation engine compartments, etc.
In the field of new energy: energy storage power stations, lithium battery fire suppression devices, etc.
Small enclosed spaces: Small spaces such as homes, vehicles, electrical cabinets, etc. can be protected using miniaturized perfluorohexane fire extinguishing devices.
In addition, perfluorohexane can also be used for extinguishing lithium-ion battery fires and can be combined with carbon dioxide to form a composite fire extinguishing and explosion suppression system.
Market and regulations: broad prospects
Perfluorohexane fire extinguishing agent has been supported by a well-established national standard – “Perfluorohexane (FK-5-1-12) Fire Extinguishing Agent” (Q/KYBZ 029-2025) has been officially implemented. The related products have obtained international certifications such as UL and FM, with a technical maturity of level 8, and can be promoted for industrialization.
The current market reference price for perfluorohexane fire extinguishing agent is approximately 48500 yuan/ton (factory price) to 100000 yuan/ton (market price). With the expansion of production capacity and the tightening of environmental regulations, its cost-effectiveness advantage will become more prominent.
The research and promotion of perfluorohexane represents a progress in the molecular design of gas fire extinguishing theory. By introducing specific functional groups into the molecular structure, scientists have optimized the environmental (low GWP) and safety (high NOAEL) properties while maintaining excellent fire extinguishing performance. This represents the core direction of future gas fire extinguishing agent research and development: achieving the unity of fire extinguishing performance and sustainability through precise molecular engineering.
From Halons to Heptafluoropropane, and then to Perfluorohexane, every iteration of gas fire extinguishing agents is an evolution – moving towards greater efficiency, environmental friendliness, and safety. Perfluorohexane is an important milestone on this evolutionary path.
