Information and translations of nitrogen dioxide in the most comprehensive dictionary definitions resource on the web. 1. Used in stuff like amonia and plant fertilizers, and found in proteins, so you need it. Nitrogen dioxide is reddish-brown with a very harsh smell at high concentrations, at lower concentrations it is colorless but may still have a harsh odour. nitrogen dioxide: a brownish irritating gas that can be released from silage and the reaction of nitric acid with metals. NO 2 forms when fossil fuels such as coal, oil, gas or diesel are burned at high temperatures. Makes about 78% of earth's atmosphere. Overview of the Nitrogen Dioxide Sterilization Process General Description of the Process Nitrogen Dioxide (NO 2) gas is a rapid and effective sterilant for use against a wide range of microorganisms. It may produce symptoms of pulmonary damage in workers who perform ensilage tasks. nitrogen dioxide - WordReference English dictionary, questions, discussion and forums. This gas plays a vital role in terms of atmospheric reactions, which produce ozone at ground level, making it the main component of smog. What does nitrogen dioxide mean? Definition of nitrogen dioxide in the Definitions.net dictionary. Nitrogen dioxide, or NO2, is a brown, highly toxic gas that can be produced by the oxidation of nitrogen (for example, combustion reactions produce NO2 and other oxides of nitrogen, as some of the oxygen reacts with nitrogen in the air) and the reaction of concentrated nitric acid with some metals (examples include copper, silver, and magnesium). The unique physical properties of NO 2 gas allow for sterilant dispersion in an enclosed environment at room temperature and ambient pressure. Nitrogen dioxide is also produced by atmospheric nuclear tests, and is responsible for the reddish colour of mushroom clouds. All Free. Nitrogen dioxide (NO 2) is a reddish-brown gas with an irritating and pungent odor.It goes through transformation when in the air, building toxic nitric acid and organic nitrates. Meaning of nitrogen dioxide. See more. What is Nitrogen Dioxide (NO 2)?. Nitrogen dioxide poisoning is the illness resulting from the toxic effect of nitrogen dioxide (NO 2).It usually occurs after the inhalation of the gas beyond the threshold limit value. Nitrogen dioxide, or NO 2, is a gaseous air pollutant composed of nitrogen and oxygen and is one of a group of related gases called nitrogen oxides, or NOx. Dioxide definition, an oxide containing two atoms of oxygen, each of which is bonded directly to an atom of a second element, as manganese dioxide, MnO2, or nitrogen dioxide, NO2. Seventh element on the periodic table. Nitrogen dioxide is part of a group of gaseous air pollutants produced as a result of road traffic and other fossil fuel combustion processes.. 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