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
Chemical and physical data
Formula C4H9NO2
Molar mass 103.12
3D model (Jmol)

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."