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Ecotoxicological information

Long-term toxicity to fish

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Description of key information

No adverse effects (mortaility, growth and behaviour) were observed in rainbow trout after exposure to freshwater containing Cereclor S52 at a mean measured concentration of up to 4.5 mg/l for 60 days or in bleaks exposed for 14 days to brackish water containing a C14-17 chlorinated paraffin (50% chlorinated) at 125 ug/l. No adverse effects on mortality or development of embryos and sac-fry of Japanese medaka were seen when fertilised eggs were exposed to two C14 chlorinated paraffins (48 or 55% chlorinated) for 20 days at concentrations up to 3400 µg/l.

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Additional information

No toxicity (deaths, and effects on growth or behaviour) was observed in rainbow trout after exposure to freshwater containing Cereclor S52 (a C14-17 chlorinated paraffin; 52% chlorination) at a mean measured concentration of up to 4.5 mg/l (the maximum achievable concentration) for 60 days (Madeley et al. 1983).

No adverse effects were seen on the mortality or development of embryos and sac-fry of Japanese medaka (freshwater fish) when fertilised eggs were exposed to two C14 chlorinated paraffins (48 or 55% chlorinated) for 20 days at concentrations up to 3400 µg/l (Fisk et al. 1999).

No deaths or effects on behaviour were seen in bleaks exposed for 14 days to brackish water containing a C14-17 chlorinated paraffin (50% chlorinated) at 125 ug/l (Bengtsson et al. 1979).