Registration Dossier

Environmental fate & pathways

Biodegradation in soil

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Description of key information

No data are put forward as this endpoint is not relevant for lead , and metals in general.

Key value for chemical safety assessment

Additional information

Annex VIII states that "Further degradation testing shall be considered if the chemical safety assessment according to Annex I indicates the need to investigate further the degradation of the substance. The choice of the appropriate test(s) will depend on the results of the chemical safety assessment."

 

Waiving of the need for data for this endpoint in the terrestrial compartment may be considered if "The substance is highly insoluble in water", or if "The substance is readily biodegradable" (ECHA 2008, Chapter R.7B – Endpoint Specific Guidance).

 

However, for an inorganic substance for which the chemical assessment is based on the elemental concentration (i.e., pooling all inorganic speciation forms together), biotic degradation is an irrelevant process: biotic processes may alter the speciation form of an element, but it will not eliminate the element from the terrestrial compartment by degradation or transformation. This elemental-based assessment (pooling all speciation forms together) can be considered as a worst-case assumption for the chemical assessment.