Derived (upper limits on the) column densities in the IRS 48 disk as a function of assumed temperature. The left panel presents column densities computed in an extended region (N_ext; dash-dotted lines) and the right panel those in a single beam (N_peak; solid lines). The NO column density is indicated with the thick orange line. The upper limit on the N₂O, NO₂, NH₂OH, CN, and C₂H are indicated with the dark red, red, green, blue, and purple lines respectively. The upper limit on the NO column density in the north is indicated with the thin orange line in the right panel. The dotted vertical black lines indicate the two assumed temperatures for which the (upper limits on the) column densities are listed in Table 2.