a: correlation between the H₂ molecular line at 9.67 μm, expressed in units of 10⁴¹ erg s⁻¹, and the SFR derived from the total IR luminosity (black line) for a catalogue of SFGs (red star). b: correlation between the H₂ molecular line at 12.28 μm, expressed in units of 10⁴¹ erg s⁻¹, and the SFR derived from the total IR luminosity (black line) for a catalogue of SFGs (red star). The green triangle shows LMG detection, which was not used to derive the correlation. c: correlation between the H₂ molecular line at 17.03 μm, expressed in units of 10⁴¹ erg s⁻¹, and the SFR derived from the total IR luminosity (black line) for a catalogue of SFGs (red star). In all three figures, the shaded areas show the 95% confidence interval of the relations, and the purple squares highlight the ULIRG population in the SFG sample.