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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Depending on local conditions and existing concentrations, disturbances in the biodegradation process of activated sludge are possible

Key value for chemical safety assessment

Additional information

In an activated sludge respiration inhibition test a 3h-EC50 of 19 mg/L was found (Klecka et al., 1985). This result is supported by studies on single species. Studies on the toxicity of formaldehyde towards microorganisms in sewage treatment plants demonstrated that this substance was harmful to the test organisms.