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Environmental fate & pathways

Biodegradation in water: screening tests

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Link to relevant study record(s)

Description of key information

Ready biodegradability (OECD 301B):
71% biodegradation within 28 days; 10 day-window met; readily biodegradable
Inherent biodegradability tests (Zahn-Wellens, OECD 302B):
> 90% within 22 days
82% within 15 days
63% within 15 days
COD:
600 mg Oxygen/g test mat.
570 mg Oxygen/g test mat.
BOD5:
400 mg Oxygen/g test mat.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Ready biodegradability was investigated in a well documented study according to OECD guideline 301B. The test substance reached 71% degradation within 28 days and the 10 day-window was met. Therefore, the substance is readily biodegradable.

Several supportive data on inherent biodegradability (Zahn-Wellens) as well as BOD5 and COD data are available from IUCLID 4 but without proof.