nitrogen dioxide

noun

, Chemistry.

a reddish-brown, highly poisonous gas, NO 2 , used as an intermediate in the manufacture of nitric and sulfuric acids, and as a nitrating and oxidizing agent; a major air pollutant from the exhaust of internal combustion engines that are not fitted with pollution control devices.

nitrogen dioxide

a red-brown poisonous irritating gas that, at ordinary temperatures, exists in equilibrium with dinitrogen tetroxide. It is an intermediate in the manufacture of nitric acid, a nitrating agent, and also an oxidizer for rocket fuels. Formula: NO 2

Grosvenor Place, which runs alongside the palace, has almost four times the maximum permissible amount of nitrogen dioxide.

When slowly heated in a vacuum vessel until ignition takes place, some nitrogen dioxide, NO2, is also produced.

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