Acetaldehyde (data page)

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This page provides supplementary chemical data on acetaldehyde.

Material Safety Data Sheet[edit]

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

Structure and properties[edit]

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[edit]

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[edit]

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[edit]

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[edit]

  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" (Queriable database). Advanced Industrial Science and Technology. Retrieved 9 June 2007. 

"NIST Standard Reference Database". 

Except where noted otherwise, data relate to standard ambient temperature and pressure.

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