As a new type of environment-friendly foaming agent for rigid polyurethane foam, it is designed to replace chlorofluorocarbons (CFCs) that have a damaging effect on the atmospheric ozone layer. Featuring an advanced production process and stable properties, it has been widely used in the production of HFC-free refrigerators and freezers, cold stores, and thermal insulation for pipes. As the deadline for phasing out the production and consumption of ozone-depleting substances (ODS) specified in the Montreal Protocol and other conventions is approaching, pentane is sure to play a pivotal role in polyurethane (PU) foaming agent production.