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Toxicity to soil macroorganisms except arthropods

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Key value for chemical safety assessment

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In total, 16 chronic data are available for 3 different species of non-arthropod soil invertebrates exposed to natural EU and North American soils. Reliable chronic NOEC/EC10 values for reproductive success range from 52 to 1091 mg added Co/kg dw, both results observed for reproduction by the pot worm Enchytraeus albidus (De Schamphelaere et al, 2008). Below are the accepted high quality studies for non-arthropod soil macro-organisms, for both the added cobalt and total cobalt values, used to calculate a geometric mean for derivation of the HC5 and terrestrial PNEC.

Table. High quality studies for non-arthropod soil macro-organisms used for derivation of the HC5 and terrestrial HC5



Added NOEC or EC 10 (mg Co/Kg dw)

Total NOEC or EC10 (mg Co/Kg dw)

 De Schamphelaere at al., 2008

 Eisenia fetida

 56 -426

 58 -437

 De Schamphelaere et al.; 2008

 Enchytraeus albidus

 52 -1091

 53 -1121

 Velicogna et al., 2010

 Eisenia andrei



Value used for CSA: Long-term EC10/LC10 or NOEC for soil non-arthropods: 52 -1091 mg/kg soil dw (added Co).