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Ecotoxicological information

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

Several studies with multiple EDTA compounds have been performed on several species of fish, incl rainbow trout, zebrafish bluegill sunfish, guppy and fathead minnow. The reliable endpoint from the study by Dow (/Batchelder) using the testsubstance (EDTA-ZnNa2) with the bluegill sunfish was chosen as key (LC50 medium hard = 685 mg/L). Recalculated as EDTA-Zn(NH4)2 gives 667.9 mg/L.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
668 mg/L

Additional information

Several studies with multiple EDTA salts or complexes covering multiple fish species indicate EDTA and/or related salts are not highly toxic to fish under common environmental conditions. Exposure to fish in soft waters could enhance toxicity, however, all data indicate LC50 values > 40 mg/L.