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Ecotoxicological information

Long-term toxicity to fish

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Description of key information

No long-term toxicity test with fish is available, but no long-term effects can be expected.

Key value for chemical safety assessment

Additional information

Since all substances within the subcategory 1 of predominantly monomers are all determined as readily biodegradable, it is foreseen that they will not pose a risk to aquatic organisms on the long-term. However, due to the poor water solubility of the test substance and as long term toxicity to aquatic organisms is a mandatory endpoint in accordance to Regulation (EC) No 1907/2006, annex IX 9.1 Aquatic toxicity. According to the “Guidance on information requirements and chemical safety assessment Chapter R.7b: Endpoint specific guidance, R.7.8.5.3” (ECHA, 2012), long-term testing of fish should only be conducted if it represents the most sensitive taxonomic group. The Guidance states that if invertebrates are likely to be more sensitive than fish and algae or the relative sensitivity of invertebrates cannot be predicted, long-term testing on Daphnia sp. should be preferred instead of fish. Therefore a long-term toxicity study with Daphnia magna was conducted to confirm that no toxicity to aquatic organisms occurs. As no effects on the reproduction of the daphnids was observed in this study, and there is no sign that fish are more sensitive than aquatic invertebrates, it cannot be expected that a long-term test with fish would show significant effects. Hence in accordance to Regulation (EC) No. 1907/2006, 9.1.5., Column 2 the chemical safety assessment according to Annex I has found no need to investigate further the effects on fish, thus a long-term study on fish is not required.