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Ecotoxicological information

Endpoint summary

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SNIF (Structure Notification Interchange Format) data provided by ECHA are available for the hazard assessment of the test substance.

In an acute earthworm study according to OECD 207 the EC0 in Eisenia fetida was determined to be 1000 mg/kg dry weight (SNIF NOTOX 1990).

Earthworm testing allows potential uptake via surface contact, soil particle ingestion and porewater, while plants and microorganisms will be exposed mainly via porewater.

It is assumed that, if there are any toxic effects of the test substance on terrestrial organisms at all, earthworms will be affected the most due to the differnet exposure routes.

This argumentation is supported by the suggestions mentioned in the ECHA Guidance on information requirements and chemical safety assessments, Chapter R.7c:

1. In general, the data required should cover not just different taxa but also different pathways of exposure (e.g. feeding, surface contact), and this should be taken into account when deciding on the adequacy and relevance of the data. Thus earthworm testing allows potential uptake via each of surface contact, soil particle ingestion and porewater, while plant exposure will be largely via porewater (page 121 and 122).

2. In general, where there is […] no effects in chronic toxicity at the limit of water solubility, […] a single short-term soil test on a suitable species would be adequate to meet the requirements of Annex IX (page 122).

3. The choice of test (invertebrate / plant / micro-organism) would be based on all the information available, but in the absence of a clear indication of selective toxicity, an invertebrate (earthworm or collembolan) test is preferred (page 122).

Therefore, terrestrial studies on other organisms will not be conducted.