Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, or factitious air, among others, [4] is a chemical compound, an oxide of nitrogen with the formula N 2 O.At room temperature, it is a colourless non-flammable gas, and has a slightly sweet scent and taste. [4] At elevated temperatures, nitrous oxide is a powerful oxidiser similar to molecular oxygen. More @Wikipedia
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