Pentafluoroethane
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| Names | |||
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IUPAC name
1,1,1,2,2-Pentafluoroethane
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| Other names
Pentafluoroethane, Genetron HFC 125, Khladon 125, Suva 125, Freon 125, Fc-125, R-125
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| Identifiers | |||
354-33-6 
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| 3D model (Jmol) | Interactive image | ||
| ChemSpider |
9256 
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| ECHA InfoCard | 100.005.962 | ||
| EC Number | 206-557-8 | ||
| PubChem | 9633 | ||
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| Properties | |||
| C2HF5 | |||
| Molar mass | 120.02 g/mol | ||
| Appearance | Colourless gas | ||
| Density | 1.53 g/cm3 (liquid at -48.5 °C) | ||
| Melting point | −103.0 °C (−153.4 °F; 170.2 K) | ||
| Boiling point | −48.5 °C (−55.3 °F; 224.7 K) | ||
| Vapor pressure | 140.0e1 kPa (at 25 °C) | ||
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is ?) |
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| Infobox references | |||
Pentafluoroethane is a refrigerant with the formula CF3CHF2. Although it has zero ozone depletion potential, it has high global warming potential, reported by the United States Environmental Protection Agency (EPA) as 3450 times that of carbon dioxide.
Pentafluoroethane in a near zeotropic mixture with difluoromethane is known as R-410a, a common replacement for various chlorofluorocarbons (commonly known as Freon) in new refrigerant systems. Pentafluoroethane is also used as a fire suppression agent in fire suppression systems.
HFC-125 (ECARO-25 / FE-25 / NAF S 125) is a gaseous fire suppression agent which can be used in clean agent fire suppression systems. It is generally used in situations where water from a fire sprinkler would damage expensive equipment, or where water-based fire protection is impractical, such as museums, banks, clean rooms and hospitals. HFC-125 does not deplete ozone (ODP 0). The HFC-125 clean agent is stored in a pressurized container and introduced into the hazard as a gas. The agent is odorless, colorless, electrically non-conductive, non-corrosive, and leaves no residue. It is used in occupied enclosed areas that contain high-value assets.
HFC-125 suppresses fire by absorbing heat energy at its molecular level faster than the heat can be generated, so the fire cannot sustain itself. It also forms free radicals to chemically interfere with the chain reaction of the combustion process. This makes it a highly effective fire fighting agent that is safe for people and causes no damage to equipment.
HFC-125 is a non-ozone depleting replacement for Halon 1301. In addition, HFC-125 leaves no residue on valuable equipment after discharge.
HFC-125 is considered a Clean Agent and is therefore included in the National Fire Protection Association's 2001 - Standard for Clean Agent Fire Extinguishing Systems.
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Wikipedia