| In database: |
| 0-6500 cm-1 |
| 60-400 nm |
Formaldehyde (H2CO)
Molecular weight 30.03 amu
Freezing point -118 C
Boiling point -19 C
HITRAN number: 20
Infrared cross-sections from PNNL
FTIR infrared cross-sections from 600 to 6500 cm-1
Data available at 5 C, 25 C, and 50 C
Spectra is composite of on the order of 10 different pressures,backfilled
with nitrogen to 760 T.
Images of PNNL data in cm2/molecule vs. wavenumbers
Images of PNNL data in cm2/molecule vs. microns
Line list from HITRAN 2008
Data from 0 to 3100 cm-1
Images of HITRAN data on a log scale
Line list from HITRAN
Data from 0 to 3000 cm-1.
Images of HITRAN data in cm/molecule vs. wavenumbers
Images of HITRAN data in cm/molecule vs. microns
UV cross-sections
From Dave Crisp
Images of UV data from 60 to 360 nm
From University of Bremen Molecular Spectroscopy and Chemical Kinetics Group
Images of UV data from 247 to 400 nm
Please see
The MPI-Mainz UV/VIS Spectral Atlas
Additional References
The Rotationally-Resolved Absorption Spectrum of Formaldehyde from 6547 to 6804 cm-1; M. Staak, E.W. Gash, D.S. Venables,
and A.A. Ruth; J.Mol.Spec. 229:115-121 (2005).
Figure 5 showing data from 6550 to 6800 cm-1.
New Analysis of the n2, n3
n4, and n6 Bands of Formaldehyde
H212C16O Line Positions and Intensities in the 5-10 mm
Spectral Region; A. Perrin, F. Keller, and J.-M. Flaud; J.Mol.Spec. 221:192-198 (2003).
Cross Sections in the 2n5 Band of Formaldehyde Studied by Cavity
Enhanced Absorption Spectroscopy Near 1.76 mm; H. Barry et al.; Phys.Chem.Chem.Phys.
4:445-450 (2002).
Figure 1 showing data from 5600 to 5700 cm-1.
FTIR Spectra of the 2n4, n4+
n6 and 2n6 Bands of Formaldehyde;
F. Ito, T. Nakanaga, and H. Takeo; Spec.Acta A 50:1397-1412 (1994).
Frequency and Intensity Analysis of the n3 Band,
n4 Band, and n6 Band of
Formaldehyde; D.C. Reuter et al.; J.Chem.Phys. 91:646-654 (1989).
Notes
Fundamental frequencies from NIST Chemistry Webbook
n1 2783 cm-1 (a1) CH2 stretch
n2 1746 cm-1 (a1) CO stretch
n3 1500 cm-1 (a1) CH2 scissor
n4 2843 cm-1 (b1) CH2 stretch
n5 1249 cm-1 (b1) CH2 rock
n6 1167 cm-1 (b2) CH2 wag
List of available data for all molecules in database
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