Smog chamber/FTIR techniques were used to measure k(Cl + CHF2OCHF2) = (5.7 +/- 1.5) x 10(-6).cm(3) molecule(-1) s(-1) in 700 Torr of N-2/O-2 diluent at 296 +/- 1 K. This result is 100 times lower than the previous literature value. The chlorine-atom-initiated atmospheric oxidation of CHF2OCHF2 gives COF2 in a molar yield of (185 +/- 22) %. The IR spectrum was recorded, and a radiative efficiency of 0.44 W m(-2) ppb(-1) was determined. The results are discussed with respect to the atmospheric chemistry and environmental impact of CHF2OCHF2.