Transformation of Ozone-Depleting Substances

As ozone-depleting substances ( ODS ozone-depleting substance (ODS) A compound that contributes to stratospheric ozone depletion. ODS include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, hydrobromofluorocarbons, chlorobromomethane, and methyl chloroform. ODS are generally very stable in the troposphere and only degrade under intense ultraviolet light in the stratosphere. When they break down, they release chlorine or bromine atoms, which then deplete ozone. A detailed list of class I and class II substances with their ODPs, GWPs, and CAS numbers is available. ) are phased out, surplus ODS must be stored, reused (after recycling or reclamation, or destroyed. As an alternative to ODS destruction, EPA permits the transformation (or conversion) of ODS to useful non-ODS products.