Melting Point of Common Alkynes

Alkynes exhibit a wide range of melting points depending on their specific structures and molecular weights. The table below provides a curated list of melting point values for different alkynes at 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)

Click on the icon to switch between degrees Celsius (°C) and degrees Fahrenheit (°F) units.

Melting Point of Alkynes

Acetylene (C₂H₂)	-80.7
Propyne (C₃H₄)	-102.7
1-Butyne (C₄H₆)	-125.7
1-Pentyne (C₅H₈)	-106
1-Hexyne (C₆H₁₀)	-132
1-Heptyne (C₇H₁₂)	-80.9
1-Octyne (C₈H₁₄)	-79.6
1-Nonyne (C₉H₁₆)	-50
1-Decyne (C₁₀H₁₈)	-44
1-Undecyne (C₁₁H₂₀)	-25
1-Dodecyne (C₁₂H₂₂)	-19
1-Tridecyne (C₁₃H₂₄)	-5
1-Tetradecyne (C₁₄H₂₆)	2.5
1-Pentadecyne (C₁₅H₂₈)	10
1-Hexadecyne (C₁₆H₃₀)	15
1-Heptadecyne (C₁₇H₃₂)	22
1-Octadecyne (C₁₈H₃₄)	27
1-Nonadecyne (C₁₉H₃₆)	33
1-Eicosyne (C₂₀H₃₈)	36
1-Heneicosyne (C₂₁H₄₀)	41
1-Docosyne (C₂₂H₄₂)	45
1-Tricosyne (C₂₃H₄₄)	49
1-Tetracosyne (C₂₄H₄₆)	52
1-Pentacosyne (C₂₅H₄₈)	55
1-Hexacosyne (C₂₆H₅₀)	57
1-Heptacosyne (C₂₇H₅₂)	60
1-Octacosyne (C₂₈H₅₄)	62
1-Nonacosyne (C₂₉H₅₆)	65
1-Triacontyne (C₃₀H₅₈)	67
1-Hentriacontyne (C₃₁H₆₀)	69
1-Dotriacontyne (C₃₂H₆₂)	71
1-Tritriacontyne (C₃₃H₆₄)	73
1-Tetratriacontyne (C₃₄H₆₆)	74
1-Pentatriacontyne (C₃₅H₆₈)	76
1-Hexatriacontyne (C₃₆H₇₀)	77
1-Heptatriacontyne (C₃₇H₇₂)	79
1-Octatriacontyne (C₃₈H₇₄)	80
1-Nonatriacontyne (C₃₉H₇₆)	82
1-Tetracontyne (C₄₀H₇₈)	83

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).