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Biodegradation in water: screening tests

In the key GLP study, conducted according to OECD Guideline 301B and EU Method C.4-C, the ready biodegradability of the test material was examined over a 28-day period by measuring CO2 evolution during exposure to an inoculum of domestic activated sludge under aerobic conditions.

The extent of biodegradation of the test material under the conditions of the study was about 10 %. The test material is not readily biodegradable over a 28-day period in this test since the pass level of 60 % ThCO2 was not reached.

In the supporting GLP study conducted according to OECD Guideline 301B and EU Method C.4-C, the ready biodegradability of the test material was examined over a 28-day period by measuring CO2 evolution during exposure to an inoculum derived from activated sludge under aerobic conditions.

The extent of biodegradation of the test material under the conditions of the study was 0 % (mean of duplicate test suspensions) over 28 days. Under the conditions of the test, the test material was not readily biodegradable.