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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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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.