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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The 192 hour toxicity threshold of blue-green algae urea was 47 mg/l. To some extent urea exhibits toxic action to Microcystis aeruginosa.  The 7 day toxicity threshold of urea to Scenedesmus quadricauda was >10000 mg/l.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
47 mg/L

Additional information

The 192 hour toxicity threshold of blue-green algae to urea was 47 mg/l. To some extent urea exhibits toxic action to Microcystis aeruginosa. The 7 day toxicity threshold of urea to Scenedesmus quadricauda was >10000 mg/l.