CFCIntroduction:The organic compound chlorofluorocarbon is known as CFC. This compound is made up of only chlorine, fluorine and carbon. CFCs are part of the group of volatile organic compounds. CFC was first invented or manufactured in 1928. The primary purpose of CFC was to be used as a refrigerant for refrigeration. Freon is the trade name for CFCs. There are several main reasons for the widespread use of CFCs. Non-toxicity and flammability were the main reason. Around the 1960s, the use of CFCs increased in developing countries. As the use of CFCs increases, the ozone layer begins to be destroyed. Fluorine and chlorine atoms are separated in the reaction, they remain in the stratosphere for a long time and slightly destroy the ozone layer. After that, other alternatives to CFCs were created. These alternatives are not harmful to the ozone layer, but they have a great influence on global warming. There are different types of CFCs. They are classified according to the number of fluorine and hydrogen. Prohibited CFCs are CFC-11, -12, -113, -114, -115. Because these CFCs have ozone depletion potential (ODP) as they are not soluble in water. CFCs are mainly emitted by aerosols, industrial waste and refrigeration. Chlorofluorocarbon reactions One of the key reactions of CFCs is: CCl3F → CCl2F. + Cl. In this reaction, a Cl atom dissociates from CCl3F in the presence of light. CFC or chlorofluorocarbon undergoes a dissociation reaction under ultraviolet radiation and produces dichlorodifluoromethane, a very reactive chlorine radical: chlorine free radicals absorb ozone from the atmosphere and produce highly reactive ClO and oxygen. In the second layer of the Earth's atmosphere, also known as the stratosphere, ozone continually undergoes formation and decay. Oxygen-free...... middle of paper ......tor in many areas including technological progress. CFCs are used extensively in the food process: seventy-five percent of food in the United States passes through a refrigerant using CFCs. CFCs are used excessively in the United States, as a study conducted by Steed showed that the price of products that CFCs were used to manufacture and produce is twenty-eight billion dollars per year. [Reference n.2]Reference list[Reference n.1]: Plummer, N., L., & Busenburg, E. (2006, March). Use of chlorofluorocarbons in hydrology, a guide. Retrieved from http://www-pub.iaea.org/MTCD/publications/pdf/Pub1238_web.pdf [Reference n.2]: Steed, M., J. (1989). Current uses of chlorofluorocarbons and effects due to environmental regulations. International Journal of Thermophysics, 10(3), 545-552. Available at http://link.springer.com/article/10.1007%2FBF00507977