nitrogen dioxide

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nitrogen dioxide

A scientist carefully measures nitrogen dioxide levels in a laboratory.

Definition
  1. Noun:
    • A highly poisonous brown gas (NO₂): A chemical compound consisting of one nitrogen atom and two oxygen atoms. It is a toxic air pollutant with a characteristic pungent, acrid odor and is a major contributor to smog and acid rain.
Usage
  • As a subject: "Nitrogen dioxide" is often discussed in environmental science and public health contexts.
  • As an object: It is measured, monitored, and regulated due to its harmful effects.
  • In compound nouns: It forms part of terms like "nitrogen dioxide levels" or "nitrogen dioxide exposure," but these are distinct phrases.
Examples
  • Noun:
    • High levels of nitrogen dioxide were recorded near the busy highway.
    • The chemical reaction releases nitrogen dioxide as a byproduct.
    • Exposure to nitrogen dioxide can aggravate respiratory diseases.
Advanced Usage
  • "Formation of nitrogen dioxide": Refers to the chemical processes, often involving combustion at high temperatures, that create this gas.
    • The formation of nitrogen dioxide in car engines is a key concern.
  • "Ambient nitrogen dioxide": Refers to the concentration of this gas in the outdoor air.
    • Regulations aim to reduce ambient nitrogen dioxide to protect public health.
Variants and Related Words
  • NO₂: The standard chemical formula for nitrogen dioxide.
  • Nitrogen oxides (NOx): A family of reactive gases that includes nitrogen dioxide (NO₂) and nitric oxide (NO).
  • Dinitrogen tetroxide (N₂O₄): A dimer that forms when nitrogen dioxide is cooled.
Synonyms
  • NO₂: (The chemical formula is used as a direct synonym in technical contexts.)
  • Brown gas: (A descriptive term referencing its color, though not a precise scientific synonym.)
Related Phrases
  • "Emission of nitrogen dioxide": The release of this gas into the atmosphere.
    • Strict controls on the emission of nitrogen dioxide from factories are necessary.
  • "Nitrogen dioxide poisoning": Illness resulting from acute exposure to high concentrations.
    • Firefighters risk nitrogen dioxide poisoning in certain types of fires.
nitrogen dioxide

A scientist carefully measures nitrogen dioxide levels in a laboratory.

Noun
  1. a highly poisonous brown gas (NO2)