nitrogen dioxide

noun

, Chemistry.

1. 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

noun

1. 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

Example Sentences

In hard-hit northern Italy, a Washington Post analysis of satellite data found, nitrogen dioxide levels also plummeted.

From Washington Post

The ULEZ has helped reduce the number of people living in areas with illegal levels of nitrogen dioxide by 94% since the start of his term, according to city hall.

From Time

Exposure can be especially troublesome for kids, who may experience neurological problems that link back to nitrogen dioxide.

From Popular-Science

For comparison, the outdoor standards for nitrogen dioxide levels in the US is 100 parts per billion on average.

From Popular-Science

From March 15 through July 23, New York City had a 21 percent decrease in nitrogen dioxide, one of several nitrogen oxide gases, in comparison with 2019 levels.

From Science News

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

From The Daily Beast

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

From Project Gutenberg