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Biodegradation in water: screening tests

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Description of key information

The study assessing the ready aerobic biodegradability of the test substance using the OECD method 301 F resulted in a biodegradation level of 78.8 % in 28 days and 58 % within the 10 day window. The item did not generate any inhibiting effect on the micro-organisms.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable but failing 10-day window

Additional information

The purpose of this study was to assess the ready biodegradability of the test item according to the OECD guideline 301 F “Ready biodegradability: Manometric Respirometry Test”.

Under the test conditions, the percentage of biodegradation of the test substance reached 58 % of the ThOD at the end of the 10 days window and 78.8 % at the end of the test (28 days).

According to OECD guideline 301, the test substance is readily biodegradable but failing the 10 day window.

The test substance did not inhibit the micro-organisms as shown by the toxicity control flask where biodegradation percentage is 52.9% higher than 25 % within 14 days.