Much less data is available for a comparable analysis with TODGA, where most references report D values at 1, 3, and 5 M [HN O 3 ] ini . While this allows for a general understanding of stoichiometric trends with acidity, it does not capture the details of the transition before and after the CMC, as seen in with Am/Eu extraction by DM-DOHEMA. A more complete analysis like the one done for a different TODGA system in Ref. would be needed (see Fig. ). Nevertheless, we plot in Fig. the logD vs log[extractant] ini and from the slope we calculate its respective stoichiometry dependence with acid for TODGA/n-dodecane/ HN O 3 system, collected from the available references. In Fig. (b) we can see a downward trends in aggregation with the increases concentration of initial acid for both Am +3 and Eu +3 ions. The average number of extractant molecules is around 3.5 molecules per ion molecule, a little lower than the literature value of 4 extractants in the low acidity case. Unlike the case of DMDOHEMA, the stoichiometry here changes at a much slower rate, reaching approximately 3 extractant molecules at [HN O 3 ] ini = 6M . In contrast, only 1 DMDOHEMA molecule is associated under similar acidity. Changes in complexes for varying initial acid have been reported before, in DMDOHEMA and TODGA systems, however the relationship this has to the CMC has not been described.