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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Link to relevant study record(s)

Description of key information

30 day study (Lumbricus terrestris - mature earthworms)  NOEC: 1000 mg I kg-1 soil (garden soil and silty clay soil)

14 day study  (Lumbricus terrestris - mature earthworms)  NOEC: 1000 mg I kg-1 soil (sandy soil)

Key value for chemical safety assessment

Long-term EC10, LC10 or NOEC for soil macroorganisms:
1 000 mg/kg soil dw

Additional information

The reviewed study investigated the toxicity of inorganic iodine (applied as KI) to terrestrial biota, which included investigating the effects on earthworms. This use of KI as the test substance, is considered relevant for read across to iodine as iodide is the major existent species of iodine in soil which is available for interactions with soil components. The protocol is not based on standard guidelines (e.g. OECD Guidelines) but follows scientific principles and is well documented, supporting a Klimisch score of 2 - reliable with restrictions. The study author concluded that there were no significant trends related to I treatments among the data. Under the protocol followed in this study, the NOEC was 1000 mg I kg -1 for the test substance (I) in all three soil types. Refer to the attached endpoint study record for further details.