The UV absorption spectra of CF₃CClH and CF₃CClHO₂ radicals have been investigated. The CF₃CClH spectrum was quantified over the wavelength range 225-280 nm. The absorption cross section at 250 nm was (139 ± 16) × 10^-20 cm² molecule^-1. The absorption spectrum for CF₃CClHO₂ was quantified over the wavelength range 225-290 nm, and at 250 nm σ_{250 nm} = (258 ± 30) × 10^-20 cm² molecule^-1. The kinetics of the reactions of the peroxy radical CF₃CClHO₂ with NO and NO₂ were studied and the derived rate constants were k₃ = (1.0 ± 0.3) × 10^-11 cm³ molecule^-1 s^-1 and k₄ = (6.4 ± 1.5) × 10^-12 cm³ molecule^-1 s^-1, respectively. The self-reaction rate for the CF₃CClHO₂ radicals was measured and a value of k_6obs = (4.4 ± 0.3) × 10^-12 cm³ molecule^-1 s^-1 was obtained. The reactions of F atoms with CF₃CH₂Cl and of CF₃CClH with O₂ were found to proceed with rate constants of k₈ = (2.0 ± 0.6) × 10^-12 cm³ molecule^-1 s^-1 and k₂ = (1.4 ± 0.1) × 10^-12 cm³ molecule^-1 s^-1, respectively. The reaction of CF₃CClHO₂ radicals with NO gives NO₂, and by implication CF₃CClHO radicals, which in the atmosphere (a) react with O₂ to give CF₃C(O)Cl and (b) decompose to give, most likely, CF₃ radicals and HC(O)Cl. In 700 Torr of N₂ diluent the rate constant ratio k_O2/k_diss = (2.1 ± 0.4) × 10^-19 cm³ molecule^-1. As part of the present work, relative rate techniques were used to measure rate constants for the reactions of Cl and F atoms with CF₃CH₂Cl of (6.8 ± 1.2) × 10^-15 and (2.1 ± 0.5) × 10^-12 cm³ molecule^-1 s^-1, respectively. All experiments were performed at 296 ± 2 K.