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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The biodegradation of the substance is 77 % (28 d), respectively 72 % (10-day-window)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

According to the guideline study OECD 301 B, the substance was tested using a concentration of nominally 20 mg organic carbon/L in test medium. Activated sludge was used as inoculum. The test was left running for 28 days. All validity criteria were met. The biodegrading of the substance is 77 % (28 d), respectively 72 % (10-day-window). The test can be considered as valid.

A supporting study according to OECD 302 B proofed the biodegradability; however the given data are not sufficient for a terminal conclusion.

Another non GLP-Study according to OECD 301 B shows deficiencies and results that could not be reproduced. Therefore these results will not be taken into the further considerations.

Additionally the substance’s biodegradability was also estimated by a calculation using the software “Biowin v4.10 (US EPA)”. The estimation resulted in a conclusion to consider the organic part of the substance as readily biodegradable.