The technique of pulsed laser photolysis/pulsed laser-induced fluorescence detection of CF3O was used to study the stratospherically important reactions of CF3O radicals with NO (k(5))r O-3 (k(4)), and O-2 (k(6)) and that of CF3-OO with NO (k(2)) and O-3 (k(3)). Over the temperature range 233-360, K, k(5)(T) = (3.34 +/- 0.68) X 10(-11) exp[(l60 +/- 45)/T] cm(3) molecule(-1) s(-1). At 298 K, k(2) = (1.57 /- 0.38) x 10(-11) cm(3) molecule(-1) s(-1) in agreement with past work. The reactions of CF3O and CF3OO with O-3 were found to be slow with rate coefficients at 298 K of k(4) = (2.5(-1.5)(+0.7)) x 10(-14) cm(3) molecule(-1) s(-1) and k(3) less than or equal to 7 x 10(-5) cm(3) molecule(-1) s(-1), respectively. No reaction of CF3O with O-2 was observed at 298 or 373 K, leading to an upper limit of k(6) less than or equal to 4 x 10(-17) cm(3) molecule(-1) s(-1) at 373 K. The implications of these results to the chemistry of CF3Ox radicals and O-3 in the stratosphere are discussed.