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Acetic acid (data page)

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Chemical 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
1.222 mPa·s at 20 °C
1.0396 mPa·s at 30 °C
0.7956 mPa·s at 50 °C
0.4244 mPa·s at 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 fusionΔfusH 		+11.7 kJ/mol
Std entropy change
of fusionΔfusS 		40.5 J/(mol·K)
Std enthalpy change
of vaporizationΔvapH 		+23.7 kJ/mol
Std entropy change
of vaporizationΔvapS 		? J/(mol·K)
Solid properties
Std enthalpy change
of formation ΔfHsolid 		? kJ/mol
Standard molar entropy
Ssolid 		? J/(mol K)
Heat capacity cp ? J/(mol K)
Liquid properties
Std enthalpy change
of formation ΔfHliquid 		−483.5 kJ/mol
Standard molar entropy
Sliquid 		158.0 J/(mol K)
Enthalpy of combustion, ΔcH –876.1 kJ/mol
Heat capacity cp 123.1 J/(mol K)
Gas properties
Std enthalpy change
of formation ΔfHgas 		–438.1 kJ/mol
Standard molar entropy
Sgas 		282.84 J/(mol K)
Heat capacity cp 63.4 J/(mol K)
van der Waals' constants a = 1782.3 L kPa/mol
b = 0.1068 liter per mole

Vapor pressure of liquid

P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600
T in °C –17.2 17.5 43.0 63.0 99.0 118.1 143.5 180.3 214.0 252.0 297.0  —

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

Acetic acid vapor pressure vs. temperature. Uses formula: P m m H g = 10 7.80307 − 1651.2 225 + T {\displaystyle \scriptstyle P_{mmHg}=10^{7.80307-{\frac {1651.2}{225+T}}}} for T = 0 to 36 °C P m m H g = 10 7.18807 − 1416.7 211 + T {\displaystyle \scriptstyle P_{mmHg}=10^{7.18807-{\frac {1416.7}{211+T}}}} 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: log 10 ⁡ P m m H g = 7.80307 − 1651.2 225 + T {\displaystyle \scriptstyle \log _{10}P_{mmHg}=7.80307-{\frac {1651.2}{225+T}}} for T = 0 to 36 °C   log 10 ⁡ P m m H g = 7.18807 − 1416.7 211 + T {\displaystyle \scriptstyle \log _{10}P_{mmHg}=7.18807-{\frac {1416.7}{211+T}}} for T = 36 to 170 °C
Formula from Lange's Handbook of Chemistry, 10th ed.

Distillation data

Vapor-liquid Equilibrium for Acetic acid/Water
P = 760 mm Hg
BP
Temp.
°C 		mole % water
liquid vapor
116.5 2.2 5.8
114.6 5.4 12.3
113.4 8.6 16.8
113.5 9.9 18.3
113.1 10.1 18.8
110.6 18.9 29.8
107.8 30.3 43.3
106.1 41.3 54.5
104.4 52.2 64.9
103.1 62.4 73.5
102.3 69.6 79.2
101.6 77.8 85.1
100.8 87.6 91.4
100.5 92.3 94.4
100.4 94.5 96.0
100.1 98.5 98.9

Spectral data

UV-Vis
λmax 207 nm (gas phase)
Extinction coefficient, ε ?
IR
Major absorption bands
(liquid film)
Wave number transmittance
2937 cm 26%
2684 cm 41%
2631 cm 39%
2569 cm 49%
1758 cm 19%
1714 cm 4%
1617 cm 66%
1414 cm 20%
1360 cm 39%
1294 cm 12%
1053 cm 67%
1016 cm 41%
937 cm 35%
892 cm 41%
629 cm 31%
607 cm 49%
481 cm 36%
473 cm 52%
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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