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Toxicity to soil macroorganisms except arthropods

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Endpoint:
toxicity to soil macroorganisms except arthropods: long-term
Data waiving:
exposure considerations
Justification for data waiving:
the study does not need to be conducted because direct and indirect exposure of the soil compartment is unlikely
Justification for type of information:
No experimental study on toxicity to terrestrial macroorganisms is available. According to Guidance Document R.7c (v3.0; 2017) it is stated, that for readily biodegradable substances which are not directly applied to soil it is generally assumed that the substance will not enter the terrestrial environment and as such there is no need for testing of soil organisms is required. Additionally, the substance cannot be regarded as adsorptive with a log Kow of 1.96 (logKow < 3) and logKoc of 1.54 (log Koc < 5) and is not toxic to aquatic organisms. It will not be present in ionized form at environmentally relevant pH (4-9) as indicated by the Dissociation constand with pKa = 10.09 at 25°C. Since the substance is not specifically toxic towards aquatic organisms it falls into Soil Hazard Category 1. Risk to soil organisms exposed to the substance is acceptable based on the PNECsoil calculated using the Equilibrium Partitioning Method and does not need to be refined using long-term tests.

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