Fluorine-based foaming agents are widely used for the rigid urethane foam insulation used in office building and home walls and ceilings, as well as in refrigerators and freezers. Currently, these foaming agents are hydrofluorocarbon （HFC）, non-ozone depleting fluorocarbon materials. Central Glass is the only company in Japan that is manufacturing and supplying HFC-245fa. However, the global-warming potential （GWP） of HFCs is high, so going forward there will be a growing demand for low-GWP materials that prevent global warming. The following is a description of Central Glass's technologies relating to next-generation foaming agents that are not ozone-depleting substances, but environmentally friendly and have low global-warming potential （low environmental impact）.