Registration Dossier
Registration Dossier
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EC number: 297-648-1 | CAS number: 93685-99-5 Oil shale waste is produced by thermal processing in a fluidized bed process at 800°C from mining exhausted oil shale. Oil shale waste consists essentially of Al2O3, CaO, CaSO4, Fe2O3 and SiO2.
Toxicity to soil macroorganisms except arthropods
Administrative data
Link to relevant study record(s)
Description of key information
No Observed Effect Concentration (NOEC) for mortality, growth, reproduction and feeding activity of the earthworm Eisenia fetida was determined to be >= 1000 mg test item/kg soil, i.e. the highest concentration tested.
Key value for chemical safety assessment
Additional information
The long-term effects of oil shale thermal processing residue to terrestrial organisms was evaluated in a long-term test (21 d) with earthworm (Eisenia fetida) according to the OECD 222 and GLP. All study validity criteria were met and no mortality was observed in any treatment group. The body weight changes of the earthworms after 4 weeks exposure to oil shale thermal processing residue (CAS 93685-99-5) were not statistically significantly different compared to the control up to and including the highest test concentration of 1000 mg test item/kg soil (Williams t-test, α = 0.05, two-sided).
The reproduction rates were not statistically significantly different compared to the control up to and including the highest test concentration of 1000 mg test item/kg soil (Williams t-test, α = 0.05, one-sided smaller). No behavioural abnormalities were observed in any of the treatment groups. The feeding activity in all the treated groups was comparable to the control:
No Observed Effect Concentration (NOEC) for mortality, growth, reproduction and feeding activity of the earthworm Eisenia fetida was determined to be >= 1000 mg test item/kg soil, i.e. the highest concentration tested.
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