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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The EC50 of 2-Norbornene was determined as EC50 >1000 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L

Additional information

measurement of toxicity to microorganisms using non-acclimaticed sludge from a domestic waste water treatment plant lead to an EC50 > 1000 mg/l. The study was conducted according to OECD 209 under GLP.

In a second, current study an EC50 of 27 mg/l (measured value) was determined. This study is currently only available as draft and several issues concerning the conduct of the study still neeed to be clarified. The study is currently not taken into consideration.