Acetic acid (data page)
From Infogalactic: the planetary knowledge core
This page provides supplementary chemical data on acetic acid.
Contents
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.
- MSDS from EM SCIENCE in the SDSdata.org database
- PTCL Safety web site
- Science Stuff
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] |
|
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 ΔfH |
? kJ/mol |
Standard molar entropy S |
? J/(mol K) |
Heat capacity cp | ? J/(mol K) |
Liquid properties | |
Std enthalpy change of formation ΔfH |
−483.5 kJ/mol |
Standard molar entropy S |
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 ΔfH |
–438.1 kJ/mol |
Standard molar entropy S |
195 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 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.
Distillation data
Vapor-liquid Equilibrium for Acetic acid/Water[3] 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[4] |
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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
- Linstrom, P.J.; Mallard, W.G. (eds.) NIST Chemistry WebBook, NIST Standard Reference Database Number 69. National Institute of Standards and Technology, Gaithersburg MD. http://webbook.nist.gov
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Except where noted otherwise, data relate to standard ambient temperature and pressure.
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