Relative rate techniques were used to measure the rate constants k[Cl + C4F9CH2CH2OC(O)CH=CH2] = (2.21 +/- 0.16) x 10-(10) and k[OH + C4F9CH2CH2OC(O)CH=CH2] = (1.13 +/- 0.12) x 10-(11) cm(3) molecule(-1) s(-1) in 700 Torr of N-2 or air diluent at 296 K. The atmospheric lifetime Of C4F9CH2CH2OC(O)CHCH2 (4:2 FrAc) is determined by its reaction with OH radicals and is approximately I day. The chlorine-atom-initiated oxidation of 4:2 FTAc in 700 Torr of air at 296 K gives C4F9CH2C(O)H in molar yields of 18% and 10% in the absence and presence of NO, respectively. The OH-radical-initiated oxidation of 4:2 FrAc in 700 Torr of air in the presence of NO gives HCHO in a molar yield of (102 +/- 7)%, with C4F9CH2CH2OC(O)C(O)H (4:2 fluorotelomer glyoxylate) as the expected coproduct. The atmospheric fate of the 4:2 fluorotelomer glyoxylate will be photolysis and reaction with OH radicals, which will lead to the fort-nation of C4F9CH2C(O)H and ultimately perfluorinated carboxylic acids. The atmospheric oxidation of fluorotelomer acrylates is a potential source of perfluorinated carboxylic acids in remote locations.