Human reference values for acute airway effects of five common ozone-initiated terpene reaction products in indoor air

► Airway effects of ozone-initiated terpene reaction products were assessed in mice. ► Sensory irritation, airway limitation, and pulmonary effects were observed. ► 3-Isopropyl-6-oxo-heptanal may be a sensory irritant of concern. ► 4-Oxopentanal may be of concern due to air-flow limitation.