[en] We report lasing on multiple wavelengths in the 5 µm region from a non-selective CW-CO laser cavity utilizing the CO₂ laser gas mixture when its gain length was maintained at LN₂ temperature. The inversion obtained in the CO medium formed by the dissociation of CO₂ gas in the discharge made this possible. The findings are significant as the handling of the toxic CO gas that is conventionally employed in the generation of wavelength in the 5 µm region has been dispensed with. A maximum CW output power of 8 W was obtained at an electro-optic efficiency of 8%. The cascading lasing transitions have been identified and matched with known transitions available in the literature. (paper)