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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The acute toxicity of Imidazolidine-2-thione (ETU) was evaluated with Poecilia reticulata in a study performed in accordance with OECD testing guideline 203 (GLP study : no data).The LC50-96h was estimated using measured concentrations as being equal to 7500 mg/L.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
7 500 mg/L

Additional information

The acute toxicity of ETU was evaluated with Poecilia reticulata in a study performed in accordance with OECD testing guideline 203 (GLP study : no data).

The fish were exposed to nominal test concentrations under semi-static conditions during 96 hours.

The LC50-96h was estimated using measured concentrations as being equal to 7500 mg/L.

Temperatures, pH range and dissolved oxygen concentration were not reported in this study, we consider the data were obtained based on the guideline requirements.