Organic compounds like CFCs but with extra hydrogen atoms, and a lower ozone-destroying potential. They have similar properties to CFCs and are being used as temporary substitutes for them.
Composed of carbon (C), chlorine (Cl) and fluorine (F), with at least one hydrogen (H) atom. The first generation of CFC substitutes; they decompose in the troposphere and have little chance of reaching the stratosphere
A family of chemicals related to CFCs which contains hydrogen, chlorine, fluorine and carbon atoms. HCFCs are partly halogenated and have much lower ODP than the CFCs. Examples of HCFC refrigerants are HCFC-22 (CHClF2) and HCFC-123 (CHCl2CF3).
Refrigerants thought to contribute to the depletion of the ozone layer although not to the extent of chlorofluorocarbons.
(HCFCs): One of the replacement chemicals for chlorofluorcarbons (CFCs); ozone-depleting potential only a fraction of CFC-12, but is a suspected greenhouse gas (see Greenhouse effect).
Compounds containing carbon, hydrogen, chlorine, and fluorine. They were originally intended as replacements for CFCs, but are only a temporary solution because they still contain chlorine and have the potential to destroy stratospheric ozone.
Organic substances composed of hydrogen, chlorine, fluorine, and carbon atoms. These chemicals are less stable than CFCs, and are therefore less damaging to the ozone layer. Hydrofluorocarbons (HFCs): Chemicals with fluorine but no chlorine, and therefore likely not damaging to the ozone layer. However, HFCs are potent greenhouse gases.
Gaseous compounds that are derivatives of methane, contain chlorine and fluorine, and are used as aerosol propellants and refrigerants.
(HCFCs) are replacements for chlorofluorocarbons (CFCs) which are less ozone-depleting than CFCs but not totally ozone-safe. HCFCs are also greenhouse gases, contributing to global warming.
Synthetically produced compounds containing varying amounts of hydrogen, chlorine, fluorine and carbon. Used as replacements for chlorofluorocarbons. They have large global warming potentials and current emissions are helping to enhance the natural greenhouse effect.
Compounds containing hydrogen, fluorine, chlorine, and carbon atoms. Although ozone depleting substances, they are less potent at destroying stratospheric ozone than chlorofluorocarbons (CFCs). They have been introduced as temporary replacements for CFCs and are also greenhouse gases.
Chemicals composed of one or more carbon atoms and varying numbers of hydrogen, chlorine, and fluorine atoms.
Man-made gases that deplete the ozone layer, but have a lower ozone depleting potential than CFCs.
(Abbreviated HCFCs) A collection of partially chlorinated and fluorinated hydrocarbons (mostly methanes and ethanes), used as refrigerants, foam-blowing agents, and solvents. These species have been developed as replacements for the now-banned chlorofluorocarbons. Examples include HCFC-141b (CH3CFCl2) and HCFC-142b (CH3CF2Cl). These compounds are less harmful to the ozone layer than the chlorofluorocarbons, due to their shorter atmospheric lifetimes. However, because their ozone depletion potentials are nonzero, these compounds will only be in use temporarily and will ultimately be phased out of production.