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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Description of key information

A 14d-EC50 of >1000 mg/kg soil (d.w.) was obtained for the test substance for the earthworm Eisenia fetida according to OECD 207.
No long-term terrestrial tests have been performed due to the hydrolytic instability of the test substance.

Key value for chemical safety assessment

Short-term EC50 or LC50 for soil macroorganisms:
1 000 mg/kg soil dw

Additional information

The test substance is covered by the category approach of methylenediphenyl diisocyanates (MDI). Hence, data of the category substances can be used to cover this endpoint. A short-term toxicity study (van der Hoeven et al, 1992), carried out according to OECD 207, is available for PMDI for the earthworm Eisenia fetida. In this limit test, a 14d-EC50 of >1000 mg/kg soil (d.w.) was obtained in artificial soil. The endpoint was based on mortality, weight increase, behaviour and appearance.

No long-term terrestrial tests on soil macro-organisms are available for the test substance. Because MDI reacts readily with water to form predominantly insoluble and inert polyurea (Yakabe et al, 1994), long-term terrestrial toxicity tests are not appropriate for the derivation of PNEC values.