oxygennitrogen

oxygennitrogen is a term occasionally used to describe compounds that contain both nitrogen and oxygen atoms, generally referring to the group of nitrogen oxides that play significant roles in atmospheric chemistry and industry. In scientific literature the expression is not common; chemists typically refer to specific species such as nitric oxide (NO), nitrogen dioxide (NO₂), nitrous oxide (N₂O), or ozone (O₃) when describing these molecules.

The most studied members—NO and NO₂—are produced in combustion processes, vehicular exhaust, and natural emissions from soils and vegetation. They participate in catalytic cycles that affect stratospheric ozone levels and modify air quality. NO is a reddish gas with a sharp odor, while NO₂ is dark brown and has a pungent smell. N₂O, a colorless gas, is a potent greenhouse gas and is used industrially as an anesthetic and a propellant. Ozone, formed from reactions of nitrogen oxides with ultraviolet light, is essential for protecting life on Earth but acts as an air pollutant at ground level.

In the context of manufacturing, nitrogen oxides are precursors to ammonia and nitric acid, key components of fertilizers. The term oxygennitrogen can therefore denote the entire class of such compounds, though precise identification is crucial in chemical, environmental, and regulatory discussions.