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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when pyranol is introduced in appropriate low concentrations.

Key value for chemical safety assessment

Additional information

There is one guideline study on the toxicity of 2H-pyran-4-ol to activated sludge available. A potential respiration inhibition induced in activated sludge by the substance was tested in compliance with OECD guideline 209. An EC50 >1000 mg/L was determined after 180 minutes of incubation (Firmenich, 2007).