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Ecotoxicological information

Long-term toxicity to fish

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Description of key information

NOELR (33 d) for freshwater fish (Pimephales promelas): ≥100 mg/l [OECD 210; test mat. (WAFs) (nominal) based on: survival and reproduction]

Key value for chemical safety assessment

Additional information

A Fish Early Life Stage study has been conducted for with GTL Gasoil using the freshwater speciesPimephales promelas(Fathead minnow) for GTL Gasoil (Priestly, 2010a). The test was conducted in accordance with OECD 210 and was compliant with GLP.

Newly laid eggs were exposed to water accommodated fractions (WAFs) of the test material over a range of nominal loading rates of 10, 32 and 100 mg/l for a period of 33 days at a temperature of 25°C ± 2°C under semi-static test conditions. The test was conducted using completely full test vessels which were covered to minimise any potential for volatile losses of the test substance.

There were no significant mortalities or sub-lethal effects at any loading rate. The mean hatching rate ranged from 92 to 95% and the mean survival rate ranged from 93 to 98%. There were no statistically significant reductions in mean fish length or dry weight at any loading rate when compared with controls. The report concluded that there were no effects on survival or growth of newly laid eggs of fathead minnows when exposure to loading rates up to 100 mg/l GTL Gasoil. The No Observed Adverse Loading Rate (NOELR) was therefore determined to be at least 100 mg/l.

The following information is taken into account for long-term toxicity to fish:

33-d NOELR for freshwater fish:≥100 mg/l.