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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Ecotoxicological information

Long-term toxicity to fish

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Administrative data

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Description of key information

The 32 day NOEC is 0.8 mg/L for Pimephales promelas.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
0.8 mg/L

Additional information

Russom and Broderius (1991) studied the toxicity of benzene in an early life stage test with Pimephales promelas. The exposure concentrations were measured at least twice a week during the exposure period. The most sensitive endpoint reported by the authors is a LOEC of 1.6 mg/L for wet weight and length. This value was the most conservative reliable chronic endpoint for freshwater fish identified in the EU RAR for benzene (2008). As the effect observed at this concentration was between 10 -20% a NOEC can be calculated by dividing the LOEC by two.

Although Black et al (1982) report a more sensitive EC10 this value was discounted in the EU RAR for benzene (2008) and so is discounted here also.