1-Butyne

1-Butyne, also known as ethylacetylene, but-1-yne, ethylethyne, and UN 2452, is an extremely flammable and reactive alkyne with chemical formula C₄H₆ and CAS number 107-00-6 that is used in the synthesis of organic compounds. It occurs as a colorless gas.[1]

1-Butyne

${\displaystyle {\ce {H-C#C}}{-}{\ce {\overset {\displaystyle {H} \atop |}{\underset {| \atop \displaystyle {H}}{C}}}}{-}{\ce {\overset {\displaystyle {H} \atop |}{\underset {| \atop \displaystyle {H}}{C}}}}{\ce {-H}}}$
Names
IUPAC name but-1-yne
Other names But-1-yne Ethylacetylene Ethylethyne
Identifiers
CAS Number	107-00-6^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:48087^Y
ChemSpider	7558^Y
ECHA InfoCard	100.003.139
EC Number	203-451-3
PubChem CID	7846
UNII	A6B47CPN6W^Y
UN number	2452
CompTox Dashboard (EPA)	DTXSID4029141
InChI InChI=1S/C4H6/c1-3-4-2/h1H,4H2,2H3^Y Key: KDKYADYSIPSCCQ-UHFFFAOYSA-N^Y InChI=1/C4H6/c1-3-4-2/h1H,4H2,2H3 Key: KDKYADYSIPSCCQ-UHFFFAOYAI
SMILES C#CCC
Properties[1]
Chemical formula	C4H6
Molar mass	54.091 g/mol
Density	0.6783 g cm^−3[1]
Melting point	−125.7 °C (−194.3 °F; 147.5 K)[1]
Boiling point	8.08 °C (46.54 °F; 281.23 K)[1]
Hazards
GHS pictograms
GHS Signal word	Danger
GHS hazard statements	H220, H280
GHS precautionary statements	P210, P377, P381, P403, P403
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is ^YN ?)
Infobox references

See also

• 2-Butyne
• Butadiene
• Cyclobutene

References

1. Lide, David R. (2008). CRC Handbook of Chemistry and Physics, 89th Edition. CRC Press. pp. 3–84. ISBN 978-0-8493-0488-0.

External links

• NIST Chemistry WebBook page for 1-butyne