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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The substance is not readily biodegradable, but inherently biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
inherently biodegradable

Additional information

Assessing the ready biodegradability of the substance as study was conducted in accordance with the EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test) which is in all essential parts identical with OECD Guideline 301 F. A solution of the test substance in a mineral medium was inoculated and incubated for 28 d under aerobic conditions. During this period, degradation was followed by BOD determinations. The test substance showed 47 % biodegradation after 28 days.

The inherent biodegradability was determined according to the OECD Guideline 302 C (Inherent Biodegradability: Modified MITI Test (II)) and results in 78 % degradation within 28 days.

Based on these results, the substance is considered to be "Not Readily Biodegradable", but "Inherently Biodegradable.