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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The 72-h ErC50 is 1,100 mg/l and the 72-h NOEC is 7.5 mg/l in Pseudokirchneriella subcapitata.

Key value for chemical safety assessment

EC50 for freshwater algae:
1 100 mg/L
EC10 or NOEC for freshwater algae:
7.5 mg/L

Additional information

Two studies with algae are available; one study is a GLP compliant OECD guideline study withPseudokirchneriella subcapitata(tested asSelenastrum capricornutum) (SafePharm Laboratories, 2003b). The 72-h ErC50 value from this study is 1,100 mg/l and the 72-h NOEC is 7.5 mg/l. The effect concentrations from this study are more critical than the other study which is an OECD guideline study withDesmodesmus subspicatusand this study has minor deviations (Slovnaft VÚRUP, a.s., 2005d). These values are used in the assessment.