Column density ratios of formamide (pink stars) and methyl cyanide (black circles) to methanol for the fiducial models but varying the binding energies of each molecule based on the range of values reported in the literature (Penteado et al. 2017; Ferrero et al. 2020; Busch et al. 2022; Minissale et al. 2022). “Low E_b” corresponds to 5500 K, 3500 K, and 3500 K for formamide, methanol, and methyl cyanide. “High E_b” corresponds to 1100 K, 8600 K, and 7600 K for these species. “Medium E_b” corresponds to the fiducial models that have binding energies in between the range. For all of these models, the same pre-factor as the fiducial models was assumed when calculating the ice and gas abundances.