Registration Dossier
Registration Dossier
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EC number: 204-427-5 | CAS number: 120-80-9
Endpoint summary
Administrative data
Description of key information
Additional information
Among the studies available in the literature on terrestrial ecotoxicity, only one of them, performed on earthworms, was reliable (Hartenstein, 1982). Despite it did not follow any guideline, it was scored as a reliability 2 and flagged as a key study. Indeed, it was fully described, the test species is that recommended in the current guidances and the measured parameters are relevant indicators of toxicity. Eisenia foetida hatchlings were exposed for 42 days to catechol concentrations of 50, 500, 2000 and 4000 mg/kg dw. Based on mortality, catechol presented 42d-NOEC and -LOEC of 2000 and 4000 mg/kg dw. Based on growth, catechol presented 42d-NOEC and -LOEC of 500 and 2000 mg/kg dw.
For the other terrestrial organisms (i.e. plants, arthropods, soil micro-organisms, birds), there is either no data at all, or no reliable data.
As recommended in the ECHA guidance on information requirements and chemical safety assessment - Chapter R10, when there is only one terrestrial result, the risk assessment, and thus the PNEC derivation, should be performed both on this test result and on the basis of the outcome of the aquatic toxicity data using the equilibrium partitioning method. As a matter of precaution, the more conservative PNEC must be retained. Based on the PNECs calculated in the "Ecotoxicological information" section of the IUCLID, the PNEC derivated from the equilibrium partitioning theory method is retained for chemical safety assessment.
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