Cobalt bis(2-ethylhexanoate)

Toxicity to soil macroorganisms except arthropods

Additional information

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.

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

	Species	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	55	58

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