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EC number: 209-599-5 | CAS number: 587-26-8
Toxicity to soil macroorganisms except arthropods
Administrative data
Link to relevant study record(s)
Description of key information
The LC0 for mortality of earthworms (Eisenia fetida) in nine chinese soils within 6 weeks was given as greater than 71.9 mg La/kg dw (162 mg REE/kg dw)
Key value for chemical safety assessment
Additional information
No information is available for the toxicity to terrestrial soil macroorganisms except arthropods with Lanthanum carbonate, but data are available for this endpoint with a mixture of rare earth elements. The structure analogy of the rare earth elements with similar toxicity was described by diverse authors (e.g. Sneller et al. 2000).
No mortality of earthworms (Eisenia fetida) was observed in nine natural chinese soils within 6 weeks (Wen et al. 2006). The overall content of Lanthanum, Yttrium, Cerium, Praseodymium and Neodymium in these soils was 18.61 - 162.28 mg/kg dw, the concentration of Lanthanum was in a range of 4.6 - 71.9 mg La/kg dw. So generally, a LC0 > 71.9 mg La/kg could be stated. Furthermore, the more than two fold higher value of the total content of rare earth elements compared to the content of La, for which also no mortality of the earthworms was stated showed, that the LC0 for Lanthanum is clearly underestimated.
Further information about the analogue source substances can be found in the data matrix of the justification for the analogue approach, which can be found either in the CSR or as attachment in Iuclid section 13.
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