Boiling Point of Common Alkynes

The boiling points of alkynes, which are a type of hydrocarbon with carbon-carbon triple bonds, generally increase with the number of carbon atoms in the molecule. The following table provides a comprehensive list of boiling point values for different alkynes at one atmospheric (atm) pressure. (1 atm = 101,325 Pa)

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Boiling Point of Alkynes

Acetylene (C₂H₂)	-84.7
Propyne (C₃H₄)	-23
1-Butyne (C₄H₆)	8
1-Pentyne (C₅H₈)	40
1-Hexyne (C₆H₁₀)	71
1-Heptyne (C₇H₁₂)	99.8
1-Octyne (C₈H₁₄)	126.2
1-Nonyne (C₉H₁₆)	151
1-Decyne (C₁₀H₁₈)	174
1-Undecyne (C₁₁H₂₀)	195
1-Dodecyne (C₁₂H₂₂)	215
1-Tridecyne (C₁₃H₂₄)	233
1-Tetradecyne (C₁₄H₂₆)	251
1-Pentadecyne (C₁₅H₂₈)	268
1-Hexadecyne (C₁₆H₃₀)	284
1-Heptadecyne (C₁₇H₃₂)	299
1-Octadecyne (C₁₈H₃₄)	314
1-Nonadecyne (C₁₉H₃₆)	328
1-Eicosyne (C₂₀H₃₈)	341
1-Heneicosyne (C₂₁H₄₀)	354
1-Docosyne (C₂₂H₄₂)	367
1-Tricosyne (C₂₃H₄₄)	379
1-Tetracosyne (C₂₄H₄₆)	391
1-Pentacosyne (C₂₅H₄₈)	403
1-Hexacosyne (C₂₆H₅₀)	414
1-Heptacosyne (C₂₇H₅₂)	425
1-Octacosyne (C₂₈H₅₄)	436
1-Nonacosyne (C₂₉H₅₆)	446
1-Triacontyne (C₃₀H₅₈)	456
1-Hentriacontyne (C₃₁H₆₀)	466
1-Dotriacontyne (C₃₂H₆₂)	476
1-Tritriacontyne (C₃₃H₆₄)	485
1-Tetratriacontyne (C₃₄H₆₆)	495
1-Pentatriacontyne (C₃₅H₆₈)	504
1-Hexatriacontyne (C₃₆H₇₀)	513
1-Heptatriacontyne (C₃₇H₇₂)	522
1-Octatriacontyne (C₃₈H₇₄)	530
1-Nonatriacontyne (C₃₉H₇₆)	539
1-Tetracontyne (C₄₀H₇₈)	547

Related Tables

References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH).