Butyl nitrite

Butyl nitrite
Clinical data
ATC code	none;
Legal status
Legal status	AU: S4 (Prescription only); UK: Controlled Drug (Medicines Act 1968); US: Unscheduled (illegal under Anti-Drug Abuse Act of 1988);
Identifiers
	IUPAC name 1-nitrosooxybutane;
CAS Number	544-16-1 ;
PubChem CID	10996;
ChemSpider	10530 ;
UNII	44P8QG0F3T;
CompTox Dashboard (EPA)	DTXSID8049418 ;
ECHA InfoCard	100.008.057
Chemical and physical data
Formula	C4H9NO2
Molar mass	103.121 g·mol−1
3D model (JSmol)	Interactive image;
Boiling point	78.0 °C (172.4 °F)
	SMILES CCCCON=O;
	InChI InChI=1S/C4H9NO2/c1-2-3-4-7-5-6/h2-4H2,1H3 ; Key:JQJPBYFTQAANLE-UHFFFAOYSA-N ;
	(verify)

Butyl nitrite is the organic compound with the formula CH₃(CH₂)₃ONO. It is an alkyl nitrite made from n-butanol. Butyl nitrite is used recreationally as poppers. Synonyms include 1-butyl nitrite, n-butyl nitrite and nitrous acid butyl ester.

It can be prepared by treating nitrous acid (generated in situ) with n-butanol.