Purification and isolation of the pure EPOs could not be achieved due to the thermal instability of the molecules. However, considering the low amount of PS (5% mol/mol) and quantitative conversion of the parent substrates, cycloreversion of the EPOs was investigated on the reaction crudes once concentrated to dryness with the use of a Smart Evaporator® working at room temperature under vacuum. The obtained solid residues could be stored at -18°C up to ten days. Despite also DIPA-O2 was found to be stable in the reaction mixture at -18 °C for over one week (Figure ), the compound resulted to revert to DIPA during solvent removal.