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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

3h-EC50 > 640 mg/L and NOEC >= 640 mg/L (activated sludge, OECD TG 209), recalculated for EDTAMn(NH4)2 would give 642 mg/L. 

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
642 mg/L

Additional information

The toxicity of EDTA-MnNa2 to activated sludge was investigated in an activated sludge respiration inhibition test, conducted according to OECD TG 209 under GLP (Geerts, 2010). In this test, no inhibition of the respiration of the activated sludge was measured at the highest concentration tested, i.e. 640 mg/L. EDTA-MnNa2 is therefore considered not harmful to activated sludge.