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Ecotoxicological information

Toxicity to terrestrial arthropods

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Reference
Endpoint:
toxicity to terrestrial arthropods: short-term
Data waiving:
exposure considerations
Justification for data waiving:
the study does not need to be conducted because direct and indirect exposure of the soil compartment is unlikely

Description of key information

Studies with terrestrial arthropods are not required as direct and indirect exposure is unlikely.

Key value for chemical safety assessment

Additional information

A direct application of ammonium thioglycolate to soil is not intented. According to the ECHA Guidance on information requirements and chemical safety assessment (chapter R.7c, ECHA, Nov. 2014), readily biodegradable substances which are not directly applied to soil will not enter the terrestrial environment and as such there is no need for testing of soil organisms. This is true for thioglycolic acid and its salts which are considered to be readily biodegradable. Additionally, these substances have only a low potential for adsorption to solids considering their low log Kow of -2.99. Thus, even if soil would be a compartment of indirect entry of thioglycolate anions after application of sewage sludge as fertiliser, it is expected that residues within the sludge are negligible. In conclusion, tests with terrestrial organisms are not relevant due to exposure considerations and intrinsic properties of the thioglycolate anion.