Propane price Refrigerant R290, or propane, is a natural hydrocarbon refrigerant that can be obtained directly from liquefied gas. Compared with Freon, a synthetic refrigerant, natural R290 does not contain chlorine atoms in its molecules, so its ODP value is zero, and it does not have a damaging effect on the ozone layer. In addition, compared with HFC substances that also have no damage to...