The two decomposition types for QOOH shown in Figure , 'QOOH β-scission' and 'HO 2 from QOOH', are also predicted by Sarathy et al. to be 10-10 4 times slower than determined in this work. The slower decomposition of QOOH would increase the predicted concentrations of QOOH; this would lead to an increased predicted importance of O 2 addition to QOOH, which can leading to a faster simulated ignition than what would be predicted based on this work.