The rate constant of the reaction C2H5O2 + OH -> Products has been measured at T = 296K using laser photolysis coupled to CRDS and LIF. C2H5O2 was generated from the reaction of Cl-atoms with C2H6 at 55 Torr O-2, whereby Cl-atoms were generated by 248 nm photolysis of (COCl)(2). OH radicals were generated simultaneously by photolysing H2O2. The initial Clconcentration (and hence C2H5O2) was determined in separate experiments by replacing C2H6 by CH3OH and thus conversion of Cl-atoms to HO2. The time-resolved OH decay was detected in excess of C2H5O2. A fast rate constant of k = (1.2 +/- 0.3) x 10(-10) cm(3) s(-1) was determined. (C) 2014 Elsevier B.V. All rights reserved.