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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

11% biodegradation was observed in the 28 day OECD 301F study, so EC 202-228-8 is not readily biodegradable. 

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The test was conducted in accordance with guideline OECD 301F. The results for EC 202-228-8 show that the test material at a concentration of 20 mg/L attained a maximum mean level of biodegradation (based on the BOD:ThOD ratio) of 11%. Less than 60% degradation was achieved within the 10-day window, so EC 202-228-8 cannot be classified as readily biodegradable. This lack of biodegradation can be in part put down to the fact the EC 202-228-8 is inhibitory to microorganisms as outlined in the OECD 209 study (IUCLID section 6.1.7), which showed the NOEC for inhibition to microorganisms to be <10 mg/L.