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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

With high probability not harmful to aquatic algae. 
No toxic effects occur at the range of the substances solubility.
EL50 (72h) and EL10 (72h) > 100 mg/L (nominal, WAF) for growth rate of Desmodesmus subspicatus (OECD 201)

Key value for chemical safety assessment

Additional information

In a GLP guideline study following OECD 201 green algae (Desmodesmus subspicatus) were exposed for 72 hours to

Hexamethylene diisocyanate, oligomers, blocked with dibutylamine [BASF SE, 2012]. Based on the low water solubility of the test item the aquatic toxicity was determined by a water accommodated fraction (WAF) with a nominal loading rate of 100 mg/L. No algal growth inhibition was observed in the treatment compared to the control. Thus, the 72-h EL50 and EL10 for growth rate inhibition is determined to be > 100 mg/L based on nominal concentrations.