One recent and extensive box modeling study with 200 ppb (1.1 mg/m3) limonene and 50 ppb indoor ozone showed formaldehyde to be the key oxidation product at 38 ppb after a cleaning event (AER=
0.76 h−1); other limonene oxidation products were also modeled at about 9 to 5 ppb for IPOH (3-isopropenyl-6-oxo-heptanal) and 4-AMCH, respectively (Carslaw, 2013).