Nitrites


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Nitrites

 

salts of nitrous acid, HNO2. Nitrites are colorless, crystalline compounds that are thermally less stable than nitrates. The nature of decomposition depends on the cation. For example, 2Ba(NO2)2 = BaO + Ba(NO3)2 + NO2 + ½N2, whereas 2AgNO2 = AgNO3 + Ag + NO.

Almost all nitrites are highly soluble in water (an exception is AgNO2). Nitrites may have both oxidizing and reducing properties.

Nitrites are obtained by the action of a mixture of NO and NO2 on oxides and hydroxides, by the reduction of nitrates, and by exchange reactions. They are used mainly in the production of azo dyes. (The most important nitrites are described in separate articles—see, for example, SODIUM NITRITE.)

References in periodicals archive ?
It said one possible reason was that nitrites in the body can form carcinogenic compounds called nitrosamines that can damage DNA.
Nitrites were blamed as one possible reason for this, as they can form carcinogenic compounds called nitrosamines that can damage DNA.
Soil homogenization: During the process of isolating and quantifying nitrifying bacteria, a previous culture was created in an enriched and selective medium with ammonium or nitrite, together with bicarbonate as a carbon source, which could last for minutes, hours or days, since these bacteria grow slowly due to the low energy yield of the process (Fiencke et al.
The low-concentrate supplementation probably contributed to the nitrate/nitrite poisoning, since ruminal microbiota ability to detoxify nitrates and nitrites is energy-depending (VALLI, 2007).
But there's something about nitrates and nitrites that make themdangerous.
And how many realize that naturally occurring nitrates or nitrites are no safer than added nitrates or nitrites?
A positive nitrite test strongly suggests UTI because nitrites in the urine indicate viable gram-negative organisms also are present in the urine.
9] WHO, Nitrates, Nitrites and N-Nitroso Compounds, Environmental Health Criteria, 5, World Health Organization, Geneva, Switzerland, 1978.
The World Health Organization considers nitrites and nitrates to be probable human carcinogens; California's Office of Environmental Health Hazard Assessment is now considering a similar designation.
The major immediate breakdown product of NO in human plasma is nitrite (N[O.
But like any ecosystem, the key drivers are invisible: colonies of nitrosomonas bacteria convert ammonia excreted by fish into nitrite, while nitrobacter bacteria convert the toxic substance into nitrates to be taken up by plants.
Nitrites oxidize the iron atoms in hemoglobin from ferrous iron (2+) to ferric iron (3+), rendering it unable to carry oxygen (Kim-shapiro et al.