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Long-term toxicity to aquatic invertebrates

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Description of key information

Two reliable 21 d chronic toxicity studies for daphnids are available, both with results in the same order of magnitude. Key value is the value used in the EU RAR 2004 from BASF as representative for the group of EDTA salts. This 21d NOEC = 25 mg/L for the test substance (ethylenediaminetetraacetic acid, disodium salt). Recalculation towards EDTA-CaNa2 via MW ratio results in 374.3/336.21 x 25 = 27.8 mg/L

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
27.8 mg/L

Additional information

Two long term studies were considered, from which the study with EDTA-Na2H2 was determined to be key. This is the same study from the EU RAR (2004), the other study with EDTA-MnNa2 showing a higher EC10 value confirms the toxicity to daphnids. To expres the endpoint as EDTA-CaNa2 a recalculation was performed.