Butyl nitrite

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Butyl nitrite
Butyl nitrite 3d structure.png
Clinical data
ATC code
  • none
CAS Number
PubChem CID
ECHA InfoCard 100.008.057 Edit this at Wikidata
Chemical and physical data
Formula C4H9NO2
Molar mass 103.12
3D model (JSmol)

Butyl nitrite is an alkyl nitrite made from n-butanol. Butyl nitrite is used recreationally as poppers.


Synonyms include 1-butyl nitrite and nitrous acid, butyl ester.

It can be prepared by reacting nitrous acid (generated in situ by reacting a metal nitrite with a mineral acid) with n-butanol.

Butyl nitrite is highly flammable.


Butyl nitrite is one of the compounds used as poppers, an inhalant drug that induces a brief euphoria. Among the inhalant's common street names are "liquid rush" (or just "rush") and "locker room." It is sometimes marketed as "liquid incense."