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Short-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Description of key information

Two reliable 48 h EC50 values for invertebrates have been derived from related EDTA complexes, from which one (Borrmann, 2007) is based on measured data. This study is therefore selected as key study. As the concentration is expressed as EDTA-FeNa a recalculation to EDTA-CaNa2 would result in 374.27/367.1 x 100.9 = 102.9 mg/L

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
102.9 mg/L

Additional information

Although multiple studies are available for daphnids, only two 48h studies are available, the other studies report either 24h or 96h results.

For this endpoint the 48h values are most relevant and both these values are in the same order of magnitude (101 -140 mg/L). As expected 24h EC50 values are somewhat higher, 96h EC50's show to be lower.