Registration Dossier
Registration Dossier
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EC number: 231-106-7 | CAS number: 7439-97-6
Toxicity to terrestrial arthropods
Administrative data
Link to relevant study record(s)
Description of key information
A bioassay was conducted with the worm Eisenia foetida, to determine the toxicity of mercury, added as methyl mercury. The 86 d study reported a NOEC of 2.3 mg/kg dry wt (nominal result). According to Slooff et al this NOEC could be considered as being a NOEC for inorganic mercury due to the long test duration, the volatility of methyl mercury and the data on the behaviour of mercury in the soil
Key value for chemical safety assessment
- Long-term EC10, LC10 or NOEC for soil dwelling arthropods:
- 2.7 mg/kg soil dw
Additional information
Three reliable studies were identified. Siegel (1991) reported a NOEC of 2 mg/kg dry wt for the beetle Tenebrio molitor. Animals were exposed through food and the endpoint measured was accelerated metamorphosis of larvae. Slugs (Arion ater) were investigated during the study of Marigomez et al (1986). Animals were exposed through food and the reported a NOEC for feed consumption and growth rate of 10 mg/kg feed. The two studies are not relevant for the PNEC derivation since exposure of the organisms were through food contaminated with mercury.
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