Crotyl alcohol^[1]

Names
Preferred IUPAC name (2E)-But-2-en-1-ol
Other names (E)-But-2-en-1-ol Crotyl alcohol Crotonyl alcohol 2-Butenol
Identifiers
CAS Number	6117-91-5 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:62891
ChEMBL	ChEMBL118459 Y
ChemSpider	13871721 Y
ECHA InfoCard	100.025.533
EC Number	207-996-8
PubChem CID	637922
UNII	D7F26UNN0B Y
UN number	2614
CompTox Dashboard (EPA)	DTXSID2052283
InChI InChI=1S/C4H8O/c1-2-3-4-5/h2-3,5H,4H2,1H3/b3-2+ Y Key: WCASXYBKJHWFMY-NSCUHMNNSA-N Y InChI=1/C4H8O/c1-2-3-4-5/h2-3,5H,4H2,1H3/b3-2+ Key: WCASXYBKJHWFMY-NSCUHMNNBR
SMILES C\C=C\CO
Properties
Chemical formula	C4H8O
Molar mass	72.10 g/mol
Density	0.8454 g/cm3
Melting point	< 25 °C (77 °F; 298 K)
Boiling point	121.2 °C (250.2 °F; 394.3 K)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H226, H302, H312, H315, H319
Precautionary statements	P210, P233, P240, P241, P242, P243, P264, P270, P280, P301+P312, P302+P352, P303+P361+P353, P305+P351+P338, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, P370+P378, P403+P235, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Crotyl alcohol, or crotonyl alcohol, is an unsaturated alcohol. It is a colourless liquid that is moderately soluble in water and miscible with most organic solvents. Two isomers of this alcohol exist, cis and trans.

It can be synthesized by the hydrogenation of crotonaldehyde. The compound is of little commercial interest.^[2]