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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Not readily biodegradable: 0 % after 28 d (OECD 301F)

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

One study is available investigating the biodegradation of 4,4',4''-methylidynetrianiline (EC No. 208-952-0) according to OECD 301F (Spoo-Klöppel, 2015). The test substance (100 mg/L) was exposed to a mixed population of aquatic microorganisms from the aeration tank of a wastewater treatment plant treating predominantly domestic sewage. Biodegradation of the test substance was followed by continuous measurement of the O2 consumption. After a contact time of 28 d no biodegradation was recorded (0 %). The toxicity control did not indicate toxicity of the test substance since 30 % degradation was recorded. Thus, the test substance is not readily biodegradable according to the OECD criteria.