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Toxicity to microorganisms

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Description of key information

A study with EDDHMA-Fe is lacking, however a study with the structurally very similar EDDHA-Fe is considered representative.
The 3 hours EC10 value for the test substance EDDHA-FeNa in the Activated Sludge Respiration Inhibition Test was 450 mg/L. The EC50 was greater than 1000 mg/L. Expressed as EDDHMA-FeNa (mol weight correction), this would give an EC50 of > 1060 mg/L and an EC10 of 477 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
477 mg/L

Additional information

In a guideline study the Inhibition of Oxygen Consumption of microbial-inoculum by the test substance EDDHA-FeNa was determined according to OECD guideline 209. The 3 hours EC10 value for the test substance EDDHA-FeNa in the Activated Sludge Respiration Inhibition Test was 450 mg/L. The EC50 was greater than 1000 mg/L.

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