Millimeter-wave, submillimeter-wave, and infrared FT transitions pertaining to the ground state and the excited stretching and torsional vibrational states of the disulfane isotopomer H 34 S 32 SH have been measured, assigned, and analyzed. Analogously to the standard isotopomer H 32 S 32 SH, a significant Coriolis interaction between the excited vibrational states has been observed and analyzed using an effective Hamiltonian explicitly involving Coriolis coupling operators between the excited states. The simultaneous analysis of all data has provided effective molecular parameters of the ground and excited vibrational states, which makes possible a full quantitative description of all transition wavenumbers. The stretching vibrational energy, which is hidden because of a negligible transition dipole moment, has been estimated from an analysis of the Coriolis and very weak nonorthorhombic vibration -rotation interactions. In addition to this, b-type rotational transitions, which are becoming intense as a consequence of an asymmetric isotopical substitution of 34 S, have also been assigned in the millimeter-wave spectra.