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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 such as SIRI, and follow its directions.
Structure and properties
| Structure and properties | |
|---|---|
| Index of refraction, nD | 1.3716 |
| Dielectric constant, εr | ? ε0 at ? °C |
| Dielectric constant, ε | 6.19 C2/(N·m2) at 25 °C |
| Bond strength | ? |
| Bond length | ? |
| Bond angle | ? |
| Magnetic susceptibility | ? |
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) |
| Heat capacity cp | 123.1 J/(mol K) |
| Gas properties | |
| Std enthalpy change of formation ΔfH | ? kJ/mol |
| Standard molar entropy S | 282.8 J/(mol K) |
| Heat capacity cp | 63.4 J/(mol K) |
Spectral data
| UV-Vis | |
|---|---|
| λmax | 207 nm (gas phase) |
| Extinction coefficient, ε | ? |
| IR | |
| Major absorption bands | 2937, 1758, 1714, 14141294, 629, 481 cm−1 |
| 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
- Orlando, John J.; Tyndall, Geoffrey S. (2003). "Gas phase UV absorption spectra for peracetic acid, and for acetic acid monomers and dimers." J. Photochem. Photobiol. A: Chem. 157, 161–66.
Except where noted otherwise, data relate to standard ambient temperature and pressure.
Chemical infobox applies.
"Acetic acid (data page)"