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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

N-(n-octyl)-2-pyrrolidinone has a 96h LC50 value of 22.0 mg/l, and a NOEC value of 4.84 mg/l

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
22 mg/L

Additional information

Two study summaries have been submitted. The study summary short-term toxicity to fish.001 states a precise LC50 value of 22.50 mg/l, whereas the summary short-term toxicity to fish.002 states a range from 22 to 46 mg/l. The value of 22.0 is taken as the LC50 endpoint, as this is the worst scenario suggested by the results found.

The summary short-term toxicity to fish.002 also states a NOEC value of 4.84 mg/l, and this result is accepted to be the NOEC value.