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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Not readily biodegradable (according to OECD criteria); moderately/partly biodegradable

Key value for chemical safety assessment

Additional information

In the key study (Ciba-Geigy, 1985), the ready biodegradability of the test item was assessed over a 28 day period by the modified Sturm test (OECD 301B). The nominal test concentrations were 10 and 20 mg a.s./L. The test material attained up to 42 and 46 % biodegradation after 28 days whereas the positive control substance (Aniline) was 100 % degraded 28 days. Therefore, the test substance is not readily biodegradable according to OECD criteria. it is moderately/partly biodegradable.

The Chemical Oxygen Demand of the test item was determined to be 1.86 g COD/g.