Is nitrogen toxic to humans?
Matthew Alvarez
Published May 11, 2026
Inhaling air containing mostly nitrogen will lead to various signs of physical and mental impairment. Depending on the concentration of nitrogen a person is exposed to, signs and symptoms from sudden unconsciousness to death due to asphyxiation could occur.
How much nitrogen is toxic to humans?
Exposure above 150 ppm for 30 min to an hour results in fatal pulmonary edema or asphyxia and can result in rapid death (Lowry and Schuman 1956; NRC 1977; Mayorga 1994).How poisonous is nitrogen?
Inhalation. Nitrogen oxides (NO2, N2O4, N2O3 and N2O5) are irritating to the upper respiratory tract and lungs even at low concentrations. Only one or two breaths of a very high concentration can cause severe toxicity. Odor is generally an adequate warning property for acute exposures.Is nitrogen harmful or toxic?
Uses and Hazards of NitrogenNitrogen is not toxic since about 78% of the air we breathe contains this gas. However, it is not harmless and it has NO SMELL. A chemical (gas or vapour) that can cause death or unconsciousness by suffocation.