How is 1,1,1,2,2-Pentafluoroethane (CAS: 354-33-6) typically synthesized?

1,1,1,2,2-Pentafluoroethane (CAS: 354-33-6) is usually synthesized by fluorination of ethylene. The process involves the addition of fluorine to ethylene using an appropriate fluorinating agent under controlled conditions. This reaction typically requires the use of a catalyst to improve the selectivity and yield of the desired product. The process is highly exothermic, and proper temperature and pressure control are essential for safety and efficiency.