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Names | |
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Preferred IUPAC name
But-1-yne | |
Other names
Ethylacetylene
Ethylethyne, UN 2452 | |
Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.003.139 |
EC Number |
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PubChem CID
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UNII | |
UN number | 2452 |
CompTox Dashboard (EPA)
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Properties[1] | |
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 labelling: | |
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Danger | |
H220, H280 | |
P210, P377, P381, P403 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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1-Butyne is an organic compound with the formula CH3CH2C≡CH. It is a terminal alkyne. The compound is a common terminal alkyne substrate in diverse studies of catalysis. It is a colorless combustible gas.[1]
1-Butyne participates in reactions typical for terminal alkynes, such as alkyne metathesis,[2] hydrogenation, condensation with formaldehyde. Based on its heat of combustion, it is slightly more stable than its isomer 2-butyne.[3]