Registration Dossier

Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The performance of the toxicity to soil macro-organisms test except arthropods was scientifically not justified.

Key value for chemical safety assessment

Additional information

In accordance to Column 2 REACH Annex IX 9.4, toxicity to soil macroorganisms, 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 soil macroorganisms. Therefore toxicity testing of soil macroorganisms is scientifically not justified.