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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The ready biodegradation of the substance in water under the conditions of the carbon dioxide (CO2) evolution test (modified Sturm test) was investigated according to OECD guideline 301B and GLP principles. A single test concentration of 12 mg/L (as TOC) was tested during 28 days.
No significant biodegradation of the substance was observed (11% after 28d). Therefore it was concluded that the substance was not readily biodegradable under the conditions of the modified Sturm test presently performed

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradation of the substance in water under the conditions of the carbon dioxide (CO2) evolution test (modified Sturm test) was investigated according to OECD guideline 301B and GLP principles. A single test concentration of 12 mg/L (as TOC) was tested during 28 days.

No significant biodegradation of the substance was observed (11% after 28d). Therefore it was concluded that the substance was not readily biodegradable under the conditions of the modified Sturm test presently performed.

In the toxicity control more than 25% biodegradation occurred within 14 days (34%, based on ThCO2). Therefore, the test substance was assumed not to inhibit microbial activity at a nominal concentration of 27.5 mg/L.

The study is considered to be reliable without restrictions.