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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

With high probability epsilon-Caprolactam is acutely not harmful to fish.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
100 mg/L

Additional information

As key study a semistatic GLP test (2002) according to OECD guideline 203 performed at the Mitsubishi Chemical Safety Institute for the Ministry of Environment, Gouvernment of Japan with Medaka as test species resulted in a LC50 (96h) >100 mg/l based on measured concentrations. The supporting study by BASF (1987) also according to OECD guideline 203 is backing this result with a LC50 (96h) of 707.1 mg/l (nominal).