RADEX grids for SO₂ (top panel), A- and E-type CH₃OH (second and third panels), and ortho- and para-H₂CO (bottom two panels) showing the percentile difference between the kinetic and rotational temperature (∆T), as a measure of thermalised transitions. The contours (solid, dashed, and dashed-dotted) in each panel indicates when ∆T=1%, 5%, and 10%, respectively. Above these contours the lines will be thermalised. The white shaded area indicates the gas density of the dust trap according to the DALI model (Leemker et al. 2023). Finally, the arrows indicate the derived excitation temperatures of T ~ 55 K for SO₂ and T ~ 130 K for CH₃OH. For H₂CO we show the rotational temperature of 150 K, the lower value of the inferred temperature range.