A proxy characterization factor (CF) for palladium was calculated. All the partition coefficients, BAF and BTF were assumed to be equal as those of Ag(I), being the closest substance with data at USEtox 2.12 database. Furthermore, it was assumed to be enough with ecotoxicological data from only one trophic level. For quality control, in a second stage, the CF of palladium was recalculated using Cr(VI) as proxy because of its high ecotoxicological impact. The only difference was observed for Human toxicity (cancer) and have been already included in the impact assessment.