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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

For freshwater algae the lowest toxicity values were the 72-h EC50 of 36.5 mg/l and the 72-h EC10 of 12.3 found in Chlamydomonas reinhardtii.

Key value for chemical safety assessment

EC50 for freshwater algae:
36.5 mg/L
EC10 or NOEC for freshwater algae:
12.3 mg/L

Additional information

A cell multiplication test with Chlamydomonas reinhardii (algae) was available. Although not conducted according to a guideline the study was found to be acceptable as no major deviations were present (Brack and Rottler, 1994). The 72-h EC50 was 36.5 mg/l and the 72-h EC10 was 12.3 mg/l, these values are used in the assessment. Other studies were found to be less critical, not reliable or the information was not enough to assess validity.