This work, besides its fundamental interest is mainly motivated by the atmospheric importance of formaldehyde. The 10-lm region is indeed a possible spectral domain for the detection of this molecule in the atmosphere and no line parameters are presently available in the atmospheric databases for H 2 CO in this spectral range. Using the experimental data available in the literature for the m 3 , m 4 , and m 6 bands [J. Chem. Phys. 91 (1989) 646 and references therein] and for the m 2 band [J. Mol. Spectrosc. 96 (1982) 353 and references therein] and adequate theoretical models it proved possible to reproduce satisfactorily the experimental data and to generate a list of line positions and intensities for the 5-10 lm region. The Hamiltonian model accounts for the various Coriolis-type resonances which perturb the energy levels of the 3 1 , 4 1 , and 6 1 vibrational states as well as for the weaker anharmonic resonances coupling the 2 1 and 3 1 energy levels. This is also the case for the line intensity calculations which allow one to reproduce satisfactorily the line by line intensity measurements as well as the integrated intensities available in the literature.