Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Nitrogen dioxide is a chemical compound with the formula NO2. One of several nitrogen oxides, nitrogen dioxide is a reddish-brown gas. It is a paramagnetic, bent molecule with C2v point group symmetry. Industrially, NO2 is an intermediate in the synthesis of nitric acid, millions of tons of which are produced each year, primarily for the production of fertilizers.
Nitrogen dioxide is poisonous and can be fatal if inhaled in large quantities.[8] The LC50 (median lethal dose) for humans has been estimated to be 174 ppm for a 1-hour exposure.[9] It is also included in the NOx family of atmospheric pollutants.
^"nitrogen dioxide (CHEBI:33101)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute. 13 January 2008. Main. Archived from the original on 4 March 2016. Retrieved 4 October 2011.
^ abcdHaynes, 4.79.
^Mendiara, S. N.; Sagedahl, A.; Perissinotti, L. J. (2001). "An electron paramagnetic resonance study of nitrogen dioxide dissolved in water, carbon tetrachloride and some organic compounds". Applied Magnetic Resonance. 20 (1–2): 275–287. doi:10.1007/BF03162326. S2CID 97875925.
^Haynes, 4.134.
^Haynes, 5.16.
^ abcNIOSH Pocket Guide to Chemical Hazards. "Nitrogen dioxide". National Institute for Occupational Safety and Health (NIOSH).
^ ab"Nitrogen dioxide". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
^ This article incorporates public domain material from Nitrogen dioxide. United States Environmental Protection Agency. Feb 23, 2016.
^"Immediately Dangerous to Life or Health Concentrations (IDLH): Nitrogen dioxide". The National Institute for Occupational Safety and Health (NIOSH). May 1994. Retrieved October 20, 2023.
Nitrogendioxide is a chemical compound with the formula NO2. One of several nitrogen oxides, nitrogendioxide is a reddish-brown gas. It is a paramagnetic...
Nitrogendioxide poisoning is the illness resulting from the toxic effect of nitrogendioxide (NO 2). It usually occurs after the inhalation of the gas...
Nitrogen is a chemical element; it has symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table...
reagent in chemical synthesis. It forms an equilibrium mixture with nitrogendioxide. Its molar mass is 92.011 g/mol. Dinitrogen tetroxide is a powerful...
it is referred to as fuming nitric acid. Depending on the amount of nitrogendioxide present, fuming nitric acid is further characterized as red fuming...
cardiovascular signalling molecule. Nitric oxide should not be confused with nitrogendioxide (NO2), a brown gas and major air pollutant, or with nitrous oxide (N2O)...
incinerators), and numerous different gases (most commonly sulphur dioxide, nitrogen oxides, and carbon monoxide, all related to fuel combustion). These...
pollution (typically, for example, around a third to a half of all nitrogendioxide emissions) and are a major driver of climate change. Agriculture and...
clouds, water vapor, pressure and temperature, nitrogendioxide, nitrogen trioxide, and chlorine dioxide. Aerosols play an essential role in the radiative...
decomposing to give free radicals (in photochemical smog). For instance, nitrogendioxide (NO2) is produced in large quantities by gasoline-burning internal...
atmosphere is about 78% nitrogen, 21% oxygen, and 1% argon, carbon dioxide, and other gases. After just two or three breaths of nitrogen, the oxygen concentration...
and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to...
oxides, but also sulfur dioxide (SO 2). From 1980 to 2020, the emission of sulfur dioxide was reduced by 80%. The emission of nitrogen compounds was also reduced...
countries monitor ground-level ozone, particulates, sulfur dioxide, carbon monoxide and nitrogendioxide, and calculate air quality indices for these pollutants...
sulfuric acid). The sulfur dioxide and nitrogendioxide dissolve, and over a period of approximately 30 minutes the sulfur dioxide is oxidized to sulfuric...
atmospheric chemistry, NOx is shorthand for nitric oxide (NO) and nitrogendioxide (NO2), the nitrogen oxides that are most relevant for air pollution. These gases...
or red within seconds from the formation of nitrosyl chloride and nitrogendioxide. It was named by alchemists because it can dissolve noble metals like...
Mixed oxides of nitrogen (MON) are solutions of nitric oxide (NO) in dinitrogen tetroxide/nitrogendioxide (N2O4 and NO2). It may be used as an oxidizing...
acceptable air quality. They also expose users to pollutants, such as nitrogendioxide, which can trigger respiratory diseases, and have shown an increase...
pollutants. These primary pollutants include nitrogen oxides, particularly nitric oxide (NO) and nitrogendioxide (NO2), and volatile organic compounds. The...
stoichiometrically into nitrogendioxide and oxygen. At temperatures of 600 K and higher, nitrogendioxide is unstable with respect to nitrogen oxide NO and oxygen...
precursor to many useful chemicals. Nitrogendioxide is a problematic pollutant from internal combustion engines. Sulfur dioxide, the principal oxide of sulfur...
with the formula N2O3. It is a nitrogen oxide. It forms upon mixing equal parts of nitric oxide and nitrogendioxide and cooling the mixture below −21 °C...
laughing gas, nitrous, nitro, or nos, is a chemical compound, an oxide of nitrogen with the formula N 2O. At room temperature, it is a colourless non-flammable...
Carbon dioxide is a chemical compound with the chemical formula CO2. It is made up of molecules that each have one carbon atom covalently double bonded...
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This article incorporates public domain material from Nitrogen dioxide. United States Environmental Protection Agency. Feb 23, 2016.
