Registration Dossier
Registration Dossier
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EC number: 220-036-2 | CAS number: 2611-82-7
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
EC50 (3h) > 1000 mg/l
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
Additional information
EU method C.11.
Preliminary test included:
- nominal concentrations of test substance of 10 (1 replicate), 100 (1 replicate) and 1000 (3 repliactes) mg/l.
- 2 blank controls
- 3 abiotic controls with test substance at 1000 mg/l
- 2 beakers to determine nitrification potential of sludge, without test substance
- nominal concentrations of 5, 10, 20 mg/l of 3,5 -dichlorophenol as reference substance.
No abiotic decomposition nor nitrifying activity were noted. Final results were expressed as nominal concentrations.
As no toxic effects were seen in all groups and 3 replicates (at 1000 mg/l) were included as recommended by the guideline, a definite study was considered as unnecessary.
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