Log(Cl/O) as function of 12+log(O/H) (left) and ionisation degree, O²⁺/O (right), for 280 (top panels) and 261 (bottom panels) of a sample of DESIRED-E objects. The fraction of the objects classified as H II regions or SFGs each represent about 50% of the sample. Top panels represent log(Cl/O) ratios calculated using the ICF(Cl) scheme by Amayo et al. (2021), and the bottom panels show those obtained using the ICF(Cl) by Izotov et al. (2006). The dotted red line represents the mean value of the log(Cl/O) obtained using each ICF(Cl). The orange diamonds indicate the mean log(Cl/O) values considering bins in 12+log(O/H) or O²⁺/O. The dashed black lines and grey bands are obtained from the solar 12+log(O/H) and Solar System log(Cl/H) ratios and their associated uncertainties recommended by Asplund et al. (2021) and Lodders & Fegley (2023), respectively.