Rate constant for the reactions of CF3OCHFCF3 with OH and Cl

Abstract The kinetics of reactions of CF 3 OCHFCF 3 with hydroxyl radicals and chlorine atoms has been investigated using a discharged flow combined with both mass spectrometer and resonance fluorescence technique and using a relative rate technique, respectively, at 298 K. The rate constant for the reactions of CF 3 OCHFCF 3 with OH and Cl was determined to be k 1 =(4.98±1.64)×10 −15 cm 3 molecule −1 s −1 and k 2 =(3.1±2.5)×10 −14 cm 3 molecule −1 s −1 , respectively. On the basis of our kinetics measurements, the tropospheric lifetime of CF 3 OCHFCF 3 is calculated to be about 8 years, primarily due to reaction with the hydroxyl radicals in the troposphere.