Acetaldehyde (data page)

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This page provides supplementary chemical data on acetaldehyde.

1 Material Safety Data Sheet
2 Structure and properties
3 Thermodynamic properties
4 Vapor pressure of liquid
5 Spectral data
6 References

[edit] Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions. MSDS is available at Safety Information Resources, inc.

[edit] Structure and properties

Structure and properties
Index of refraction, n_D	1.3392 at 18°C
Abbe number	?
Dielectric constant, ε_r	21.1 ε₀ at 21 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension^[1]	22.3 dyn/cm at 10°C 21.2 dyn/cm at 20°C 17.0 dyn/cm at 50°C
Viscosity^[2]	0.2751 mPa·s at 0°C 0.2521 mPa·s at 10°C 0.2307 mPa·s at 20°C

[edit] Thermodynamic properties

Phase behavior
Triple point	? K (? °C), ? Pa
Critical point^[3]	466 K (183 °C), 5570 kPa
Std enthalpy change of fusion, Δ_fusH^o	2.310 kJ/mol
Std entropy change of fusion, Δ_fusS^o	15.43 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	26.12 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	–196.4 kJ/mol
Standard molar entropy, S^o_liquid	117.3 J/(mol K)
Enthalpy of combustion, Δ_cH^o	–279.0 kJ/mol
Heat capacity, c_p	96.21 J/(mol K) at 0°C 89.05 J/(mol K) at 25°C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	–170.7 kJ/mol
Standard molar entropy, S^o_gas	250.3 J/(mol K)
Heat capacity, c_p	55.32 J/(mol K) at 25°C

[edit] 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.

log10 of Acetaldehyde vapor pressure. Uses formula: obtained from CHERIC

log₁₀ of Acetaldehyde vapor pressure. Uses formula: $\scriptstyle \log_e P_{mmHg} =$ $\scriptstyle \log_e (\frac {760} {101.325}) - 18.27131\log_e(T+273.15) - \frac {7241.251} {T+273.15} + 130.8048 + 2.633634 \times 10^{-5} (T+273.15)^2$ obtained from CHERIC^[3]

[edit] Spectral data

UV-Vis

λ_max

? nm

Extinction coefficient, ε

Major absorption bands^[4]

Wave number	transmittance
(liquid film)
3432 cm⁻¹	72%
3001cm⁻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%

NMR

Proton NMR

Carbon-13 NMR

Other NMR data

Masses of
main fragments

[edit] References

^ Lange's Handbook of Chemistry, 10th ed. pp 1661-1663
^ Lange's Handbook of Chemistry, 10th ed. pp 1669-1674
^ ^a ^b Pure Component Properties. Chemical Engineering Research Information Center. Retrieved on 27 May 2007.
^ [http://www.aist.go.jp/RIODB/SDBS/cgi-bin/cre_index.cgi Spectral Database for Organic Compounds] (Queriable database). Advanced Industrial Science and Technology. Retrieved on 9 June 2007.