An experimental study for rate constants of the gas phase reactions of CH3CH2OOH with OH radicals, O3, NO2 and NO

The rate constants for ethyl hydroperoxide (EHP, CH3CH2OOH) reactions with OH radicals, O3, NO2 and NO in the gas phase have been investigated, by use of in situ long-path Fourier transform infrared spectroscopy. At 293 ± 2 K temperature and 760 Torr pressure, the measured values are kEHP+OH = (5.92 ± 0.36) × 10−12, kEHP+O3≤(8.4±0.1)×10−21kEHP+O3≤(8.4±0.1)×10−21, kEHP+NO2≤(9.7±0.3)×10−21kEHP+NO2≤(9.7±0.3)×10−21 and kEHP+NO ≤ (1.2 ± 0.1) × 10−21 cm3 molecule−1 s−1. The atmospheric lifetimes of EHP with respect to these reactions have been estimated from these values, and the atmospheric implications have been briefly discussed.