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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The 72h-ErC50 and 72h-NOErC are > 1000 and 1000 mg/L respectively in a OECD guideline 201 test with Selenastrum capricornutum under GLP (reliability 2, no specific chemical analysis).

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
1 000 mg/L

Additional information

The toxicity of (hydroxyethyl)urea to the Unicellular Green Alga, Selenastrum capricornutum, was evaluated according to OECD TG 201. The 72 -hour EbC50 and ErC50 values were estimated to be >1000 mg a.i. /L. The 72-hour NOEC was 1000 mg a.i. /L. All results were based on the nominal concentrations.