The Belousov-Zhabotinsky (BZ) reaction is known to oscillate both in batch and in a continuous-flow stirred tank reactor (CSTR).  The classical BZ system is the most studied chemical oscillator, and consists of bromate ions, malonic acid, and cerium ions as a catalyst in sulfuric acid solution.  A simpler chemical system known as the minimal bromate (MB) oscillator has been found to oscillate in a CSTR over an extremely narrow range of conditions.  The MB oscillator consists of bromate, bromide, and either cerium or manganese ions in sulfuric acid.  We report here the discovery of a new batch chemical oscillator obtained simply by combining BrO₃^-, Br^-, and H₂SO₄.  Periodic oscillations in the potential of a Pt electrode have been observed at 25 ^oC for [BrO₃^-]₀ ranging from 1.5 x 10^-3 M to 6.4 x 10^-2 M.  The optimal [Br^-]₀ corresponds to a [BrO₃^-]₀/[Br^-]₀ ratio of 3.5-4, a commonly used ratio in studies of the BZ oscillator.  Optimal [H₂SO₄]₀ is consistent with the rate law for the apparently rate-determining initial step:  R = 2.1[BrO₃^-][Br^-][H⁺[² = (2-4) x 10^-11 M s^-1.  The peaks have a maximum amplitude of 15 mV and typically a period of 7 min at a stirring rate of about 500 rpm; oscillations have been found to continue for several hours.  Stirring rate appears to affect the specific nature of the oscillations.  Complex dynamical behavior has been observed, including period 2 oscillations and apparent chaos.  A possible mechanism for the oscillator will be discussed.