nitrous oxide


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nitrous oxide

or

nitrogen (I) oxide,

chemical compound, N2O, a colorless gas with a sweetish taste and odor. Its density is 1.977 grams per liter at STP. It is soluble in water, alcohol, ether, and other solvents. Although it does not burn, it supports combustion since it decomposes into oxygen and nitrogen when heated. The gas is prepared commercially by the thermal decomposition of ammonium nitrate, NH4NO3, at about 240°C; to produce nitrous oxide and water; the reaction must be carefully controlled to prevent explosive decomposition of the nitrous oxide. The gas is purified, liquified by compressing and cooling it, and stored in metal cylinders. A major use of nitrous oxide is in anesthesia, e.g., in dentistry. It is commonly called laughing gas since it produces euphoria and mirth when inhaled in small amounts. It is also used in making certain canned pressurized foods, e.g., instant whipped cream. Nitrous oxide was discovered (1772) by Joseph Priestley, who called it "diminished nitrous air"; he prepared it from "nitrous air" (nitric oxide, NO) by treatment with iron powder or a mixture of iron and sulfur powders. Its properties were further studied (1799) by Sir Humphry DavyDavy, Sir Humphry,
1778–1829, English chemist and physicist. The son of a woodcarver, he received his early education at Truro and was apprenticed (1795) to a surgeon-apothecary at Penzance.
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Nitrous Oxide

 

laughing gas, one of the oxides of nitrogen. It is used as medicine in a mixture with oxygen to induce inhalation narcosis in surgical operations and childbirth, and sometimes in myocardial infarction. It was called laughing gas by the English chemist H. Davy, who, while experimenting on himself to study the effect of nitrous oxide (1799), observed excitation in the initial phase, accompanied by laughter and chaotic body movements, and, in the following phase, unconsciousness.

nitrous oxide

[′nī·trəs ′äk‚sīd]
(inorganic chemistry)
N2O Colorless, sweet-tasting gas, boiling at -90°C; slightly soluble in water, soluble in alcohol; used as a food aerosol, and as an anesthetic in dentistry and surgery. Also known as laughing gas; nitrogen monoxide.

nitrous oxide

a colourless nonflammable slightly soluble gas with a sweet smell: used as an anaesthetic in dentistry and surgery. Formula: N2O
References in periodicals archive ?
Inhaling nitrous oxide directly from the canister is very dangerous because the gas is under such high pressure.
The Talk To Frank website states: "It is very dangerous to inhale nitrous oxide directly from the canister, and doing it in an enclosed space is also very dangerous.
Contraindications for using nitrous oxide are pregnancy (in patients, health care providers, and assistants).
Dring Coun Barbara Dring, chair of the committee, confirmed the venue would only receive a warning but added: "The committee wish to emphasise ignorance was no defence in law in allowing the sale of nitrous oxide from balloons at the premises.
It became illegal to supply or import nitrous oxide for human consumption following the introduction of the Psychoactive Substances Act in May 2016.
"Not only is using nitrous oxide for anything other than its intended use extremely dangerous -- it can even prove fatal -- the anti-social behaviour associated with those inhaling it has a negative impact on those living and working in the area and it will not be tolerated."
This study focuses on comparing the sedative efficacy of oral midazolam and nitrous oxide for dental extraction in children.
Tony Cornberg, defending, said: "Unlike heroin, cocaine and ketamine, there are various legitimate uses for nitrous oxide and he was engaged in selling this product for legitimate purposes.
It followed a spate of thefts of nitrous oxide - also known as laughing gas or hippy crack - from medical sites in the area.