R-125

Pentafluoroethane

Names
IUPAC name 1,1,1,2,2-Pentafluoroethane
Other names Pentafluoroethane, Genetron HFC 125, Khladon 125, Suva 125, Freon 125, Fc-125, R-125
Identifiers
CAS Number	354-33-6 Y
3D model (Jmol)	Interactive image
ChemSpider	9256 N
ECHA InfoCard	100.005.962
EC Number	206-557-8
PubChem CID	9633
InChI InChI=1S/C2HF5/c3-1(4)2(5,6)7/h1H N Key: GTLACDSXYULKMZ-UHFFFAOYSA-N N InChI=1/C2HF5/c3-1(4)2(5,6)7/h1H Key: GTLACDSXYULKMZ-UHFFFAOYAX
SMILES FC(F)C(F)(F)F
Properties
Chemical formula	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)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
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.