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Acetaldehyde (data page)

This page provides supplementary chemical data on acetaldehyde.

Last revised
Jul 28, 2026
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≈ 2 min
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Wikipedia ↗

This page provides supplementary chemical data on acetaldehyde.

Material Safety Data Sheet

The handling of this chemical may require safety precautions. The directions on the Material Safety Datasheet (MSDS) should be followed.

Structure and properties

Structure and properties
Dielectric constant, εr 21.1 ε0 at 21 °C
Surface tension1 22.3 dyn/cm at 10 °C
21.2 dyn/cm at 20 °C
17.0 dyn/cm at 50 °C

Thermodynamic properties

Phase behavior
Std entropy change
of fusion, ΔfusSo 		15.43 J/(mol·K)
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid 		–196.4 kJ/mol
Standard molar entropy,
Soliquid 		117.3 J/(mol K)
Enthalpy of combustion, ΔcHo –1167 kJ/mol
Heat capacity, cp 96.21 J/(mol K) at 0 °C
89.05 J/(mol K) at 25 °C
Gas properties
Std enthalpy change
of formation, ΔfHogas 		–170.7 kJ/mol
Standard molar entropy,
Sogas 		250.3 J/(mol K)
Heat capacity, cp 55.32 J/(mol K) at 25 °C

Vapor pressure of liquid

P in mm Hg 1 10 40 100 400 760
T in °C –81.5 –56.8 –37.8 –22.6 4.9 20.2

Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

log10 of Acetaldehyde vapor pressure. Uses formula: log e ⁡ P m m H g = {\displaystyle \scriptstyle \log _{e}P_{mmHg}=} log e ⁡ ( 760 101.325 ) − 18.27131 log e ⁡ ( T + 273.15 ) − 7241.251 T + 273.15 + 130.8048 + 2.633634 × 10 − 5 ( T + 273.15 ) 2 {\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-18.27131\log _{e}(T+273.15)-{\frac {7241.251}{T+273.15}}+130.8048+2.633634\times 10^{-5}(T+273.15)^{2}} obtained from CHERIC2 source ↗

Spectral data

IR
Major absorption bands3
(liquid film)
Wave number transmittance
3432 cm−1 72%
3001 cm−1 66%
2846 cm−1 42%
2733 cm−1 44%
1727 cm−1 4%
1629 cm−1 79%
1429 cm−1 36%
1401 cm−1 41%
1350 cm−1 25%
1179 cm−1 70%
1114 cm−1 29%
945 cm−1 77%
767 cm−1 61%
514 cm−1 35%
References

References

  1. Lange's Handbook of Chemistry, 10th ed. pp. 1661–1663
  2. "Pure Component Properties". Chemical Engineering Research Information Center. Archived from the original on 3 June 2007. Retrieved 27 May 2007.
  3. "Spectral Database for Organic Compounds". Advanced Industrial Science and Technology. Archived from the original (Queriable database) on 5 May 2006. Retrieved 9 June 2007.

Linstrom, Peter (1997). "NIST Standard Reference Database". National Institute of Standards and Technology. doi:10.18434/T4D303. {{cite journal}}: Cite journal requires |journal= (help)

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