Acetic acid (data page)

This page provides supplementary chemical data on acetic acid.

Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source and follow its directions.

Structure and properties

Structure and properties
Index of refraction, nD 1.3716
Dielectric constant, εr 6.15 ε0 at 20 °C
Bond strength  ?
Bond length  ?
Bond angle  ?
Magnetic susceptibility  ?
Surface tension 26.6 dyn/cm at 30 °C
Viscosity[1]
1.222 mPa·sat 20 °C
1.0396 mPa·sat 30 °C
0.7956 mPa·sat 50 °C
0.4244 mPa·sat 110 °C

Thermodynamic properties

Phase behavior
Triple point 289.8 K (16.7 °C), ? Pa
Critical point 593 K (320 °C), 57.8 bar
Eutectic point with water –26.7 °C
Std enthalpy change
of fusion
ΔfusHo
+11.7 kJ/mol
Std entropy change
of fusion
ΔfusSo
40.5 J/(mol·K)
Std enthalpy change
of vaporization
ΔvapHo
+23.7 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
483.5 kJ/mol
Standard molar entropy
Soliquid
158.0 J/(mol K)
Enthalpy of combustion, ΔcHo –876.1 kJ/mol
Heat capacity cp 123.1 J/(mol K)
Gas properties
Std enthalpy change
of formation
ΔfHogas
–438.1 kJ/mol
Standard molar entropy
Sogas
282.84 J/(mol K)
Heat capacity cp 63.4 J/(mol K)
van der Waals' constants[2] a = 1782.3 L2 kPa/mol2
b = 0.1068 liter per mole

Vapor pressure of liquid

P in mm Hg11040100400760152038007600152003040045600
T in °C–17.217.543.063.099.0118.1143.5180.3214.0252.0297.0 

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

Acetic acid vapor pressure vs. temperature. Uses formula: for T = 0 to 36 °C for T = 36 to 170 °C
Formula from Lange's Handbook of Chemistry, 10th ed.
log10 of acetic acid vapor pressure vs. temperature. Uses formula: for T = 0 to 36 °C   for T = 36 to 170 °C
Formula from Lange's Handbook of Chemistry, 10th ed.

Distillation data

Vapor-liquid Equilibrium for Acetic acid/Water[3]
P = 760 mm Hg
BP
Temp.
°C
mole % water
liquidvapor
116.52.25.8
114.65.412.3
113.48.616.8
113.59.918.3
113.110.118.8
110.618.929.8
107.830.343.3
106.141.354.5
104.452.264.9
103.162.473.5
102.369.679.2
101.677.885.1
100.887.691.4
100.592.394.4
100.494.596.0
100.198.598.9

Spectral data

UV-Vis
λmax 207 nm (gas phase)
Extinction coefficient, ε  ?
IR
Major absorption bands[4]
(liquid film)
Wave numbertransmittance
2937 cm126%
2684 cm141%
2631 cm139%
2569 cm149%
1758 cm119%
1714 cm14%
1617 cm166%
1414 cm120%
1360 cm139%
1294 cm112%
1053 cm167%
1016 cm141%
937 cm135%
892 cm141%
629 cm131%
607 cm149%
481 cm136%
473 cm152%
NMR
Proton NMR δ CDCl3 2.10 (3H), 11.42 (1H)
Carbon-13 NMR δ CDCl3 20.8, 178.1
Other NMR data  
MS
Masses of
main fragments
  60 (75%), 45 (90%),
43 (100%), 42 (13%), 15 (17%)

References

  1. Lange's Handbook of Chemistry, 10th ed. pp 1669-1674
  2. Lange's Handbook of Chemistry 10th ed, pp 1522-1524
  3. "Binary Vapor-Liquid Equilibrium Data" (Queriable database). Chemical Engineering Research Information Center. Retrieved 5 May 2007.
  4. "Spectral Database for Organic Compounds". Advanced Industrial Science and Technology. Archived from the original (Queriable database) on 14 January 2013. Retrieved 9 June 2007.
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