Nitrogen dioxide dissolves in water and reacts with water to form
Nitrogen dioxide is a brown-red, highly active gaseous substance.
Nitrogen dioxide plays an important role in the formation of ozone.
Man-made nitrogen dioxide mainly from the release of
high-temperature combustion process, such as motor vehicles, power
plant emissions and so on. One of the causes of nitrogen dioxide or
acid rain is the variety of environmental effects, including the
effects of changes in competition and composition between wetland
and terrestrial plant species, reduced atmospheric visibility,
acidification of surface water, eutrophication (Due to nitrogen and
phosphorus rich in nutrients such as algal blooms caused by a large
number of hypoxia) and increase in water harmful to fish and other
In addition to natural sources of nitrogen dioxide, the main fuel
from the combustion, urban vehicle exhaust. In addition, the
industrial production process can also produce some nitrogen
dioxide. It is estimated that the world's annual anthropogenic
pollution of nitrogen oxides emitted about 53 million tons.
In addition, the lightning can also produce NO2, in the lightning,
due to strong electric field in the air, air molecules are torn and
conductive, lightning current through the large heat generated, so
that the state has been free air composition N2, O2 combination.
N2 + O2 === 2NO, NO further reacts with O2 in the air to produce
NO2NO + O2 === 2NO2, NO2 and cloud combine into HNO3, 3NO2 + H2O =
2HNO3 + NO, fall with rainwater and become natural nitrogen
Used as an oxidizing agent in chemical reaction and rocket fuel,
used as a catalyst in the production of sulfuric acid in nitroso
NO2 is used as an intermediate in the manufacturing of nitric acid,
as a nitrating agent in manufacturing of chemical explosives, as a
polymerization inhibitor for acrylates, and as a flour bleaching
It is also used as an oxidizer in rocket fuel, for example in red
fuming nitric acid; it was used in the Titan rockets, to launch
Project Gemini, in the maneuvering thrusters of the Space Shuttle,
and in unmanned space probes sent to various planets