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EC number: 235-252-2
CAS number: 12141-20-7
The following information is taken
into account for any environmental exposure assessment:
Based on the the literature overview
and the discussion above on BCF/BAF, the following
bioaccumulation/bioconcentration factors have been derived and further
used for Pb:
- Aquatic compartment
factors in freshwater: 1,553 L/kg (wet weight)
- Soil compartment
The biota-to-soil accumulation factor
(BSAF) for earthworms in soil is dependent on the effective cation
exchange capacity (eCEC) of the soil:
log BSAF (kgdw/kgdw)
= -0.89 * log eCEC (cmolc/kg) +0.55
For comparison with the PNECoral for
birds and mammals, this BSAF must be expressed on a fresh weight basis.
The conversion of dry weight to fresh weight is based on an average dry
matter of 16% in earthworms (Jager 1998):
= 0.16 * BSAF (kgdw/kgdw)
A generic BSAF factor of 0.048 (fresh
weight) is derived for a soil with a median eCEC of 16 cmolc/kg
soil. Fresh-weight based BSAF values for a soil with an eCEC of 8 and 30
cmolc/kg soil, corresponding to the 10thand 90thpercentile
of eCEC in European arable soils are 0.089 and 0.028, respectively.
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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