Chemical Properties of 2-Butynal (CAS 1119-19-3)


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InChI Key
Molecular Weight1
Other Names
  • 1-Formyl-1-propyne
  • But-2-ynal
  • Methylacetyllealdehyde
  • Tetrolaldehyde
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Physical Properties

Property Value Unit Source
Δf 86.08 kJ/mol Joback Calculated Property
Δfgas 60.83 kJ/mol Joback Calculated Property
Δfus 11.53 kJ/mol Joback Calculated Property
Δvap 33.37 kJ/mol Joback Calculated Property
IE [10.20; 10.28] eV Show Hide
IE 10.28 eV NIST
IE 10.25 ± 0.05 eV NIST
IE 10.20 eV NIST
log10WS -0.57 Crippen Calculated Property
logPoct/wat 0.209 Crippen Calculated Property
McVol 60.190 ml/mol McGowan Calculated Property
Pc 5343.52 kPa Joback Calculated Property
Tboil 379.70 K NIST
Tc 549.03 K Joback Calculated Property
Tfus 282.94 K Joback Calculated Property
Vc 0.238 m3/kmol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas [89.96; 116.36] J/mol×K [348.58; 549.03] Show Hide
Cp,gas 89.96 J/mol×K 348.58 Joback Calculated Property
Cp,gas 94.79 J/mol×K 381.99 Joback Calculated Property
Cp,gas 99.45 J/mol×K 415.40 Joback Calculated Property
Cp,gas 103.93 J/mol×K 448.80 Joback Calculated Property
Cp,gas 108.24 J/mol×K 482.21 Joback Calculated Property
Cp,gas 112.38 J/mol×K 515.62 Joback Calculated Property
Cp,gas 116.36 J/mol×K 549.03 Joback Calculated Property

Pressure Dependent Properties

Property Value Unit Pressure (kPa) Source
Tboilr 300.70 K 4.50 NIST


Property Value Unit Temperature (K) Source
Pvap [1.33; 202.64] kPa [285.72; 426.15] The Yaw... Show Hide
Equationln(Pvp) = A + B/(T + C)
Coefficient A1.38625e+01
Coefficient B-3.24478e+03
Coefficient C-4.66930e+01
Temperature range, min.285.72
Temperature range, max.426.15
Pvap 1.33 kPa 285.72 Calculated Property
Pvap 3.06 kPa 301.32 Calculated Property
Pvap 6.39 kPa 316.93 Calculated Property
Pvap 12.31 kPa 332.53 Calculated Property
Pvap 22.16 kPa 348.13 Calculated Property
Pvap 37.64 kPa 363.74 Calculated Property
Pvap 60.83 kPa 379.34 Calculated Property
Pvap 94.17 kPa 394.94 Calculated Property
Pvap 140.43 kPa 410.55 Calculated Property
Pvap 202.64 kPa 426.15 Calculated Property

Similar Compounds

2-Butyne. But-2-yn-1-yl radical. 2,4-Hexadiyne. CH3-CC-CC-CH2. Cyanopropyne. 2-Butynoic acid. 2-Butyne, 1-chloro-. 1,3-Pentadiyne. 2-Pentyn-4-one. Pent-2-ynal. Propyne-d4. 2-Propynal. Propyne. Propyne-3,3,3-d1. 1-Penten-3-yne.

Find more compounds similar to 2-Butynal.


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