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Long-term toxicity to fish

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The performance of a test for long-term toxicity to fish was considered scientifically not justified.
REACH Regulation (EC) No 1907/2006, Annex VIII, Sect. 9.1.3, Col. 2, states as follows:
“9.1.3: The study (long-term toxicity to fish) does not need to be conducted if:
- there are mitigating factors indicating that aquatic toxicity is unlikely to occur, for instance if the substance is highly insoluble in water or the substance is unlikely to cross biological membranes”
The test item is not stable in aquatic environment. Due to the unstable nature of organic peroxides, it can be assumed that upon contact with water and organic matter, the test item undergoes rapid degradation resulting in the formation of respective alcohols and acids. In addition, the substance is poorly water soluble and has a adsorption coefficient (log Koc) < 3 (log Koc = 2.69). Thus, the CSR does not show a need for an additional long-term aquatic test. Risk assessment is based on the short-term tests for all throphic levels.

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