gas molecular entity elemental molecule mutagen ozone trioxygen ozone trioxygene An elemental molecule with formula O<small>₃</small>. An explosive, pale blue gas (b.p. −112°C) that has a characteristic, pungent odour, it is continuously produced in the upper atmosphere by the action of solar ultraviolet radiation on atmospheric oxygen. It is an antimicrobial agent used in the production of bottled water, as well as in the treatment of meat, poultry and other foodstuffs. ozono Ozon ozone trioxygen O3 Trisauerstoff [OO2] reactive oxygen species triatomic oxygen tracer antiseptic drug disinfectant electrophilic reagent oxidising agent greenhouse gas