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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Biodegradation in water - Manometric Respirometry Test (OECD Guideline 301F; GLP compliant): readily biodegradable (82.5 % after 28 days)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

The test item was determined with non-adapted activated sludge in the Manometric Respirometry Test (OECD 301F; GLP) for a period of 28 days. The test item concentration selected as appropriate was 18 mg/L, corresponding to a ThOD of 50.6 mg O2/L per test vessel. In the toxicity control containing both test and reference item 66 % degradation occurred within 14 days. The functional control reached the pass level > 60 % within 2 days.The mean biodegradation of the test item after 28 days was 82.5 %. The results indicate that the test item is readily biodegradable as the pass level of 60 % degradation was reached in a 10-day window within the 28 day period of the study.