HFC-125 fire suppression agent is an environmentally acceptable replacement for Halon 1301. HFC-125 has a zero ozone depleting potential, a low global warming potential, and a short atmospheric lifetime. It is particularly useful where an environmentally acceptable agent is essential, where clean-up of other media presents a problem, where weight versus suppression potential is a factor, where an electrically non-conductive medium is needed, and where people compatibility is an overriding factor. HFC-125 can be used to protect a wide range of applications from sensitive electrical equipment to industrial applications. Consult the current NFPA Standard 2001 and/or ISO 14520 for specific applications. HFC-125 fire suppression agent is used with Fike’s total flooding systems.
HFC-125 is an odorless, colorless, liquefied compressed gas. It is stored as a liquid and dispensed into the hazard as a colorless, electrically non-conductive vapor that is clear and does not obscure vision. It leaves no residue and has acceptable toxicity for use in occupied spaces at design
concentration. HFC-125 extinguishes a fire by a combination of chemical and physical mechanisms. HFC-125 does not displace oxygen and therefore is safe for use in occupied spaces without fear of oxygen deprivation.

HFC-125 is of high organic purity and essentially residue-free, meeting the following quality specifications:
• Purity, % by weight: 99.0 Min.
• Moisture, ppm by weight: 10 Max.
• Acidity, ppm by weight, expressed as HCl: 0.1 Max.
• Residue, % by volume: 0.01 Max.

Chemical Name/Formula Pentafl uoroethane / CHF2CF3
CAS Number 354-33-6
European Classifi cation Number EC-No.: 206-5578
Molecular Weight 120.02
Vapor Density @ 25°C (77°F) and atm, kg/m3 (lb/ft3) 4.982 m3 (0.3111)
Vapor Pressure, Saturated @ 25°C (77°F), bar (psia) 13 bar (200.4)
Boiling Point, 1 atm, °C (°F) -48.14 (-54.7)
Freezing Point, °C (°F) -103 (-153)
Solubility in Water in FE-25 @ 25°C (77°F), ppm 700
Critical Temperature, °C (°F) 66.25 (151.25)
Critical Pressure, bar (psia) 36 (526.6)
Critical Volume, cc/mole 210
Critical Density, kg/m3 (lb/ft3) 571.9 (35.70)
Specifi c Heat, Liquid (CP) @ 25°C (77°F), KJ/Kg- °C (Btu/lb°F) 1.37 (0.327)
Specifi c Heat, Vapor (CP) @ 25°C (77°F) KJ/Kg- °C (Btu/lb°F) and 1 atm 0.809 (0.193)
Heat of Vaporization @ Boiling Point KJ/Kg (Btu/lb) 164.4 (70.7)
Thermal Conductivity, Liquid @ 25°C (77°F), W/m- °C (Btu/hr-ft°F) 0.0652 (0.0377)
Thermal Conductivity, Vapor @ 25°C (77°F), W/m- °C (Btu/hr-ft°F) 0.0166 (0.0096)
Viscosity, Liquid @ 25°C (77°F), cP (lb/ft-hr) 0.137
Viscosity, Vapor @ 25°C (77°F), cP (lb/ft-hr) 0.013
Ozone Depletion Potential 0
Global Warming Potential (based on a 100-yr horizon relative to CO2) 2800
Estimated Atmospheric Lifetime* 32.6 years
Inhalation Exposure Limit (AEL-8 and 12hr. TWA), ppm** 1000

    * Computer rooms
    * Telecommunication centers
    * Records and data archives
    * Testing / imaging equipment
    * Reference material
    * Chemical laboratories
    * Clean rooms
    * Control rooms
    * Flammable liquid storage
    * Offshore drilling rigs
    * Robotic equipment
    * Textile manufacturing
    * Electric utility facilities
    * Media storage
    * Military vehicles
    * Art / artifacts / historical collections

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