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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

Description of key information

Readily biodegradable in freshwater: 67.9% degradation in 28 days (OECD 301B)
Readily biodegradable in saltwater: 89% degradation in 28 days (OECD 306)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

One study investigating the ready biodegradability of the test substance in freshwater is available. Following the OECD 301B guideline the ready biodegradability of the test item was assessed over a 28 day period (Laus 2001). The test material attained up to 67.9 % biodegradation after 28 days whereas the positive control substance (sodium acetate) reached the pass level after 14 days. These results indicate that the test item is readily biodegradable. Taking into account that the substance is a UVCB with a homologue distribution, the 10 days window is not applicable.

In addition, one ready biodegradation test in saltwater is available. The test was performed according to OECD guideline 306 and GLP using natural seawater as inoculum (Laud 2003). The observed biodegradation of 89% in 28 days confirmed the ready biodegradability of the test substance in the aquatic environment.