Sonolysis of bisphenol A (BPA), a representative endocrine disrupting chemical, has been studied at different temperatures ranging from 5 to 70 degrees C in aqueous solutions under various gases at 489 kHz. The degradation rate constant increased significantly with temperature under O-2 and air up to 50 degrees C and 30 degrees C, respectively. In this temperature range, the rate constants for O-2 and air were significantly higher than those for Ar and N-2, under which they hardly changed with temperature. The degradation rate constants decreased in the order O-2 > air > Ar > N-2. These results are in contrast with the thermal theory of sonochemistry. By adding tert-butanol as an OH radical scavenger, the degradation rate decreased significantly, revealing that OH radical reactions are responsible for the temperature effects on BPA sonolysis.