Bromodifluoromethane
Encyclopedia
Bromodifluoromethane or Halon 1201 or FC-22B1 is a gaseous trihalomethane
or a hydrobromofluorocarbon.
It can be prepared be reaction of hydrogen
and dibromodifluoromethane
at temperature in range 400–600 °C.
Critical point
data: Tc = 138.83 °C (411.98 K); pc = 5.2 MPa (51.32 bar); Vc = 0.275 dm3.mol-1.
Bromodifluoromethane was used as a refrigerant
and in fire extinguishers. It is a class I ozone depleting substance with ozone depletion potential
ODP = 0.74. It was banned by Montreal Protocol
in 2000.
Trihalomethane
Trihalomethanes are chemical compounds in which three of the four hydrogen atoms of methane are replaced by halogen atoms. Many trihalomethanes find uses in industry as solvents or refrigerants. THMs are also environmental pollutants, and many are considered carcinogenic...
or a hydrobromofluorocarbon.
It can be prepared be reaction of hydrogen
Hydrogen
Hydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly...
and dibromodifluoromethane
Dibromodifluoromethane
Dibromodifluoromethane is a mixed halomethane. It is a colorless non-flammable liquid.Along with Halons 1211, 2402, and 1301, it is the most effective fire extinguishers, however, also the most toxic one.It is a class I ozone depleting substance ....
at temperature in range 400–600 °C.
Critical point
Critical point (thermodynamics)
In physical chemistry, thermodynamics, chemistry and condensed matter physics, a critical point, also called a critical state, specifies the conditions at which a phase boundary ceases to exist...
data: Tc = 138.83 °C (411.98 K); pc = 5.2 MPa (51.32 bar); Vc = 0.275 dm3.mol-1.
Bromodifluoromethane was used as a refrigerant
Refrigerant
A refrigerant is a substance used in a heat cycle usually including, for enhanced efficiency, a reversible phase change from a liquid to a gas. Traditionally, fluorocarbons, especially chlorofluorocarbons, were used as refrigerants, but they are being phased out because of their ozone depletion...
and in fire extinguishers. It is a class I ozone depleting substance with ozone depletion potential
Ozone depletion potential
The ozone depletion potential of a chemical compound is the relative amount of degradation to the ozone layer it can cause, with trichlorofluoromethane being fixed at an ODP of 1.0. Chlorodifluoromethane , for example, has an ODP of 0.055...
ODP = 0.74. It was banned by Montreal Protocol
Montreal Protocol
The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances believed to be responsible for ozone depletion...
in 2000.