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Ecotoxicological information

Sediment toxicity

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Description of key information

The performance of the sediment toxicity test was scientifically not justified.

Key value for chemical safety assessment

Additional information

In accordance to Column 2 REACH Annex X 9.5.1, long-term toxicity to sediment organisms, can be waived as the results of the chemical safety assessment do not indicate the need to investigate further the effects of the relevant degradation products on sediment organisms. Upon contact with water or water vapour substances of the Persulfate Category hydrolyse into cation and persulfate anion. Hydrolysis is temperature and pH dependent. Decomposition rates increase with decreasing pH value and increasing temperature. The persulfate anion, independent of the cation, undergoes further decomposition in normal water or acid conditions, readily oxidizing water to oxygen, producing sulphate and hydrogen ions. All persulfate decomposition products are ubiquitous to the environment. Hydrolysis is metal catalyzed, and rapid reaction with organic matter is also possible. Thus persulfates are not expected to be distributed into the sediment and consequently, also not to cause toxicity to sediment organisms. Therefore long-term toxicity testing of sediment organisms is scientifically not justified.