Nitrogen Dioxide ^NO₂

Hazard pictograms

Nitrogen dioxide (NO2) consists of one nitrogen atom (N) and two oxygen atoms (O). The gas is brown or orange at room temperature and atmospheric pressure and is a highly toxic gas with a characteristic pungent odor.

Nitrogen dioxide is primarily formed as a byproduct of fossil fuel combustion, which is why the gas can pose health hazards in places like parking garages and tunnels. NO2 is highly toxic and, when released, affects the lower respiratory tract, potentially leading to pulmonary edema in severe cases.

It is essential to be aware of safety and implement appropriate precautions when working with nitrogen dioxide.