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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The 72-hour EC50 (growth rate) was determined to be 0.063 mg L-1. The NOEC (growth rate) was 0.05 mg L-1.

Key value for chemical safety assessment

Additional information

An algal study Is available following OECD guideline 201 (Enste-Diefenbach 2003). Eight test concentrations were used and these were analysed using ICP-OES. Results were based on geometric mean values of analytically determined concentrations at test start and after 72 hours. The 72-hour EC50 (growth rate) was determined to be 0.063 mg L-1. The NOEC (growth rate) was 0.05 mg L-1.

For palladium a single, worst case PNEC value has been derived for each environmental compartment, to cover all palladium substances. The PNEC has been derived based on the most toxic palladium substance, diamminedichloropalladium. Therefore, although toxicity results for diamminedicloropalladium are likely to overestimate the toxicity of palladium substances that do not contain a chloro ligand, this data is included in the dossiers for all palladium substance as it was taken into account in PNEC derivation.