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Acetaldehyde (data page)

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This page provides supplementary chemical data on acetaldehyde.

Material Safety Data Sheet

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

Structure and properties

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Structure and properties
Index of refraction, nD 1.3392 at 18 °C
Abbe number ?
Dielectric constant, εr 21.1 ε0 at 21 °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?
Surface tension[1] 22.3 dyn/cm at 10 °C
21.2 dyn/cm at 20 °C
17.0 dyn/cm at 50 °C
Viscosity[2] 0.2751 mPa·s at 0 °C
0.2521 mPa·s at 10 °C
0.2307 mPa·s at 20 °C

Thermodynamic properties

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Phase behavior
Triple point ? K (? °C), ? Pa
Critical point[3] 466 K (183 °C), 5570 kPa
Std enthalpy change
of fusion, ΔfusHo 		2.310 kJ/mol
Std entropy change
of fusion, ΔfusSo 		15.43 J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo 		26.12 kJ/mol
Std entropy change
of vaporization, ΔvapSo 		? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid 		? kJ/mol
Standard molar entropy,
Sosolid 		? J/(mol K)
Heat capacity, cp ? 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

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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: obtained from CHERIC[3]

Spectral data

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UV-Vis
λmax ? nm
Extinction coefficient, ε ?
IR
Major absorption bands[4]
(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%
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments 		 

References

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  1. ^ Lange's Handbook of Chemistry, 10th ed. pp. 1661–1663
  2. ^ Lange's Handbook of Chemistry, 10th ed. pp. 1669–1674
  3. ^ a b "Pure Component Properties". Chemical Engineering Research Information Center. Archived from the original on 3 June 2007. Retrieved 27 May 2007.
  4. ^ "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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