Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

As mentioned previously, in the case of the current substance (i.e., lead borate salt), the chemical safety assessment will be based on elemental metal concentration of Pb (worst case), regardless of their (pH-dependent) speciation in the environment. Hence, as the assessment is based on the element concentration (i.e., Pb), physicochemical processes like phototransformation and hydrolysis are not relevant. Formation of different Pb-hydroxides or B-hydroxides may occur, but the chemical assessment will not make any differentiation among the different Pb-species and B-species, respectively (pooling of different speciation forms). This elemental-based assessment (pooling all speciation forms together) can be considered as a worst-case assumption for the chemical assessment. In general, (abiotic) degradation is an irrelevant process for inorganic substances that are assessed on an elemental basis.