Liquid-phase vapor pressures (P L ) and octanol-air partition coefficients (K OA ) for N-ethyl perfluorooctane sulfonamide, N-methyl perfluorooctanesulfonamidoethanol, N-ethyl perfluorooctanesulfonamidoethanol, and four fluorotelomer alcohols (CF 3 (CF 2 ) n CH 2 CH 2 OH, n ) 3, 5, 7, and 9) were estimated as a function of temperature using a technique based on measuring gas chromatographic retention times relative to those of hexachlorobenzene. The method was calibrated using volatility data for fluorinated aromatic substances, chlorinated benzenes, and pesticides. The fluorinated telomer alcohols were found to have a volatility higher than that of the nonfluorinated alcohols of similar chain length and higher than that of perfluorinated aromatics of comparable molar mass. On the basis of their volatility, the polyfluorinated chemicals are expected to occur predominantly in the atmospheric gas phase. The water-air partition coefficient (K WA ) for the three shorter carbon chain length fluorotelomer alcohols was determined as a function of temperature using equilibrium static headspace gas chromatography and the phase ratio variation method. The K WA values of the three fluorinated telomer alcohols extrapolated to 25 °C are of a similar order of magnitude (1 < log K WA < 2) and suggest that rain scavenging is not a very efficient atmospheric deposition process.