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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Aquatic toxicity studies with substance zinc dipropionate are not available. In the assessment of substance zinc dipropionate, read-across to the assessment entities soluble zinc substances and propionate is conservatively applied since the ions of substance zinc dipropionate determine its fate and toxicity in the environment. The aquatic hazard assessment is based on the most toxic moiety, i.e. the zinc cation.

Please refer to the section for the respective assessment entity for data on the moieties. In brief:

Propionate:

The EC50 value (> 500 mg/l) and the EC20 value for algae toxicity (also > 500 mg/L) which can be taken as a dose descriptor for chronic effects are considerably above the limit doses of the respective guidelines and considerably above the cut values for classification an acute or chronic hazard to the aquatic environment.

Zinc:

The lowest IC50 value amounts to 0.136 mg Zn/L and the lowest NOEC/EC10 values to 0.019 mg Zn/L and 0.0078 mg Zn/L for freshwater algae and marine algae, respectively.

Key value for chemical safety assessment

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