What does hydrazine mean?
Hydrazine is a nitrogen-containing inorganic compound with the formula N₂H₄. It is a colorless, flammable liquid that is highly toxic and must be handled with rigorous safety precautions. Its principal historical and industrial role is as a rocket propellant: hydrazine has been used in missile and spacecraft propulsion systems, including as a monopropellant, in which it decomposes to produce hot gas. It also functions as a reducing agent in some chemical and industrial processes. Because of its reactivity and toxicity, the compound is typically discussed in technical, engineering, safety, or environmental contexts rather than everyday speech. Its name combines the hydro- element, associated with water and hydrogen, with the -azine ending used in names of nitrogen compounds. Although hydrazine can be useful in specialized applications, it presents serious risks through inhalation, skin contact, and contamination of the environment.
nounA colorless, flammable, highly toxic inorganic compound with the formula N₂H₄. It is used chiefly as a rocket propellant and as a reducing agent in chemical and industrial processes.
- A colorless, flammable, highly toxic compound with the chemical formula N₂H₄, used as a rocket propellant and chemical reducing agent.
"Hydrazine has been used as a propellant in spacecraft and missile rocket engines."
"Hydrazine is used as a propellant in some rocket engines."
"The chemical is handled under strict safety controls because hydrazine is highly toxic."
Usually used in the singular for the specific compound N₂H₄. The plural may refer to compounds in the hydrazine family or to multiple quantities of the substance.
"Several hydrazines are used as intermediates in chemical synthesis."
Hydrazine has helped propel rockets into space, but the same compound is highly toxic and must be handled with exceptional care.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does hydrazine come from?
The name hydrazine combines the hydro- element, associated with water and hydrogen, with the -azine ending used in names of nitrogen-containing compounds. Its modern chemical sense dates from the late nineteenth century, when hydrazine was isolated and studied as a distinct compound. The term belongs to the same broader chemical vocabulary that includes names such as hydrogen, hydroxide, and hydrate.
How hydrazine is actually used
A technical and industrial term. Outside chemistry and aerospace contexts it is uncommon, and references commonly emphasize the compound's toxicity and hazardous handling requirements.