Distribution of (left to right) the H₂ volume density, gas kinetic temperature, dust temperature, and H₂CO fractional abundance with evolutionary phases of our sample. The horizontal lines within the distribution marks the mean of our sub-sample, gray distributions in the H₂ volume density and dust temperature shows the mean of the ATLASGAL sample by Urquhart et al. (2022), and blue distribution in the H₂ volume density is the ATLASGAL Top 100 sample by Giannetti et al. (2025).