The HO2 + CH3C(O)O-2 reaction consists of three product channels: CH3C(O)OOH + O-2 (Ria), CH3C(O)OH + O-3 (Rib), and OH + CH3C(O)O + O-2 (Ric). The overall rate constant (k(1)) and product yields (alpha(1a), alpha(1b), and alpha(1c)) were determined over the atmospherically relevant temperature range of 230-294 K at 100 Torr in N-2. Time-resolved kinetics measurements were performed in a pulsed laser photolysis experiment in a slow flow cell by employing simultaneous infrared (IR) and ultraviolet (UV) absorption spectroscopy. HO2 and CH3C(O)O-2 were formed by Cl-atom reactions with CH3OH and CH3CHO, respectively. Heterodyne near- and mid-infrared (NIR and MIR) wavelength modulation spectroscopy (WMS) was employed to selectively detect HO2 and OH radicals. Ultraviolet absorption at 225 and 250 nm was used to detect various peroxy radicals as well as ozone (03). These experimental techniques enabled direct measurements of alpha(1a), and alpha(1b) via time-resolved spectroscopic detection in the MIR and the UV, respectively. At each temperature, experiments were performed at various ratios of initial HO2 and CH3C(O)O-2 concentrations to quantify the secondary chemistry. The Arrhenius expression was found to be k(1)(T) = 1.38:16.1"73 X 10(-12) exp[(730 +/- 170)/T] cm(3) molecule(-1) s(-1) alpha(1a) was temperature-independent while ait, and alc decreased and increased, respectively, with increasing temperatures. These trends are consistent with the current recommendation by the IUPAC data evaluation. Hydrogen-bonded adducts of HO2 with the precursors, HO2-CH3OH and HO2 center dot CH3CHO, played a role at lower temperatures; as part of this work, rate enhancements of the HO2 self-reaction due to reactions of the adducts with HO2 were also measured.