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EC number: 235-252-2
CAS number: 12141-20-7
According to the guidance given in Annex VII of REACH and Chapter R.7B (Endpoint Specific Guidance) of the ECHA REACH guidance (ECHA, 2017), the requirements for “Ready biodegradability” can be waived if the substance is inorganic (e.g., Pb-salt).
For inorganic substances such as lead salts, 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, regardless of the environmental compartment that is under consideration: biotic processes may alter the speciation form of an element, but will not eliminate the element from the aquatic compartment by degradation of transformation. This elemental-based assessment (pooling all speciation forms together) can be considered as a worst-case assumption for the chemical assessment.
No relevant degradation data exist for lead. Degradation is not an applicable endpoint for lead. However as a result of naturally occurring geochemical processes metal ions can partition from the water column. Data on water column residence time, the processes involved at the water – sediment interface (i.e. deposition and re-mobilisation) are fairly extensive, but have not been integrated into a meaningful database. More information can be fouund in the section "Additional information on environmental fate and behaviour".
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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