This page provides supplementary chemical data on acetaldehyde.
Material Safety Data Sheet
The handling of this chemical may require safety precautions. The directions on the Material Safety Datasheet (MSDS) should be followed. SDSdata.org index
Structure and properties
Structure and properties Dielectric constant, εr 21.1 ε0 at 21 °C Surface tensionLange's Handbook of Chemistry, 10th ed. pp. 1661–1663 22.3 dyn/cm at 10 °C21.2 dyn/cm at 20 °C17.0 dyn/cm at 50 °C
Thermodynamic properties
Phase behavior Std entropy changeof fusion, ΔfusSo 15.43 J/(mol·K) Liquid properties Std enthalpy changeof 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 °C89.05 J/(mol K) at 25 °C Gas properties Std enthalpy changeof 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 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.
Spectral data
IR Major absorption bands (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%
References