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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Long-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

A long-term fish study according to OECD 210 was performed to assess the chronic toxicity of the test item to Pimephales promelas. Pimephales promelas were exposed to a solution of the test item at a single nominal concentration of 10 mg/L for a period of 33 days. The geometric mean measured test concentrations were determined to be 8.3 mg/L and no effects were found on hatching, survival, weight or length, at this concentration. The NOEC is therefore ≥ 8.3 mg/L.


This value is supported by the measured data available for 2,2‘-azobis(isobutyronitrile). The 14-day NOEC in a flow-through study with Oryzias latipes, based on mortality, weight, and length was ≥10 mg/L.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
8.3 mg/L

Additional information