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Ecotoxicological information

Toxicity to terrestrial plants

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Description of key information

The performance of the toxicity to terrestrial plants test was scientifically not justified.

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Additional information

In accordance to Column 2 REACH Annex IX and X 9.4.3 and 9.4.6, short- and long-term toxicity to terrestrial plant, can be waived if the substance has no high potential to adsorb to soil and is not very persistent and if direct and indirect exposure of the soil compartment is unlikely. Direct and indirect exposure of the soil compartment is unlikely as the substance hydrolyses upon contact with water into cation and persulfate anion. 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 soil and consequently, also not to cause toxicity to terrestrial plants. Therefore, toxicity testing of terrestrial plants is scientifically not justified.