1-Hexyne

1-Hexyne
Names
	Preferred IUPAC name Hex-1-yne
	Other names n-Butylacetylene
Identifiers
CAS Number	693-02-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:176793;
ChemSpider	12209 ;
ECHA InfoCard	100.010.671
EC Number	211-736-9;
PubChem CID	12732;
UNII	5FZF2F38F5;
CompTox Dashboard (EPA)	DTXSID30870753 ;
	InChI InChI=1S/C6H10/c1-3-5-6-4-2/h1H,4-6H2,2H3 Key: CGHIBGNXEGJPQZ-UHFFFAOYSA-N;
	SMILES CCCCC#C;
Properties
Chemical formula	C6H10
Molar mass	82.146 g·mol−1
Appearance	colorless liquid; (impure samples can appear yellowish)
Density	0.72 g/cm3
Melting point	−132 °C (−206 °F; 141 K)
Boiling point	71 to 72 °C (160 to 162 °F; 344 to 345 K)
Solubility in water	0.36 g/L
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritant, Flammable, Health Hazard
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H304, H315, H319, H335
Precautionary statements	P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P301+P310, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P312, P321, P331, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501
Flash point	−20 °C (−4 °F; 253 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

1-Hexyne is a hydrocarbon consisting of a straight six-carbon chain having a terminal alkyne. Its molecular formula is HC₂C₄H₉. A colorless liquid, it is one of three isomers of hexyne. It is used as a reagent in organic synthesis.