The rate constant of the reaction Cl + CFCl2H (k(1)) has been measured relative to the established rate constant for the reaction Cl + CH4 (k(2)) at 760 Torr. The measurements were carried out in Pyrex reactors using a mixture of CFCl2H, CH4, and Cl-2 in either N-2 or N-2/O-2 diluent. Reactants and products were quantified by GC/FID analysis. Cl atoms were generated by irradiation of the mixture with 360 nm light to dissociate the Cl-2 for temperatures up to similar to 550 K. At higher temperature, the Cl-2, dissociated thermally, and no irradiation was used. Over the temperature range 298-670 K, k(1) is consistently a factor of similar to 5 smaller than that of k(2) with a nearly identical temperature dependence. The optimum non-Arrhenius rate constant is represented by the expression k(1) = 1.14 x 10(-22) T-3.49 e(-241/T) cm(3) molecule(-1) s(-1) with an estimated uncertainty of +/- 15% including uncertainty in the reference reaction. CFCl3 formed from the reaction CFCl2 + Cl-2 (k(3)) is the sole product in N-2 diluent. In similar to 20% O-2 at 298 K, the CFCl3 product is suppressed. The rate constant of reaction 3 was measured relative to that of reaction 4 [CFCl2 + O-2 (k(4))] giving the result k(3/)k(4) = 0.0031 +/- 0.0005 at 298 K. An earlier experiment by others observed C(O)FCl to be the major product of reaction channel 4 [formed via the sequence, CFCl2(O-2) -> CFCl2O -> C(O)FCl + Cl]. Our current experiments verified that there is a Cl atom chain reaction in the presence of O-2 as required by this mechanism.