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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Description of key information

Ágh, 2010, was selected as the key study for this endpoint. The study was conducted according to the OECD 201 Guideline and under GLP conditions using the prefered model (Pseudokirchnerella subcapitata), exposure duration (72 hours) and test medium (freshwater). The study reported a 72 hour EC50 of 25.94 mg/l extrapolated from the observed results, and a 72 hour EC50 of >4.48 mg/l based upon the observations within the test.
Erickson & Hawkins, 1980, is presented as supporting information only. It reported a NOEC of 2.0 mg/l (the highest concentration tested) and no effects on algae were observed during the study.

Key value for chemical safety assessment

EC50 for freshwater algae:
25.94 mg/L

Additional information

Ágh, 2010, was selected as the key study due to the reliability, age and test methodology, test species and test duration used. No deviations from the test guideline were reported in the study report and the reporting was considered to be of sufficient detail to allow comparison to other substances.

Erickson & Hawkins, 1980, was conducted using a novel methodology and gave limited information on test parameters. it was therefore awarded the reliability score of 4 as there was insufficient information to allow for assessment of reliability. This study was therefore included as supporting information only.