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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The test substance is acutely harmful to algae

Key value for chemical safety assessment

Additional information

Under supervision of the Japanese Ministry of the Environment a test on the green algae Pseudokirchneriella subcapitata according to OECD 201 was conducted and published in 1999. The 72h-NOEC was 11 mg/L and the 72h-EC50 based on growth rate was determined to be 54 mg/L. This result is supported by further publications. Calamari and co-workers, 1980 determined a 96 -h EC50 based on fluorimetric values of 20 mg/L for Pseudokirchneriella subcapitata. For Chlorella pyrenoidosa van Leeuwen et al., 1985 determined an 96h-EC50 of 56 mg/L based on the growth rate.