Chlorofluorocarbon | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-17

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Chlorofluorocarbon


00:01:11 1 Structure, properties and production
00:04:13 2 Applications
00:05:15 3 Classes of compounds, nomenclature
00:06:41 3.1 Numbering system
00:09:03 4 Reactions
00:10:06 5 Impact as greenhouse gases
00:12:28 6 History
00:14:39 6.1 Commercial development and use
00:16:56 6.2 Regulation
00:22:51 6.2.1 Regulatory gap
00:23:50 6.2.2 Regulation and DuPont
00:25:13 6.3 Phasing-out of CFCs
00:28:45 6.4 Development of alternatives for CFCs
00:30:58 7 Tracer of ocean circulation
00:31:45 7.1 CFC and SFsub6/sub tracer-derived age of ocean water
00:34:11 7.1.1 Partial pressure and ratio dating techniques
00:39:21 8 Safety



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SUMMARY
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Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated paraffin hydrocarbons that contain only carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivative of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon. The most common representative is dichlorodifluoromethane (R-12 or Freon-12). Many CFCs have been widely used as refrigerants, propellants (in aerosol applications), and solvents. Because CFCs contribute to ozone depletion in the upper atmosphere, the manufacture of such compounds has been phased out under the Montreal Protocol, and they are being replaced with other products such as hydrofluorocarbons (HFCs) (e.g., R-410A) and R-134a.