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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

For both 6-(isononanoylamino)hexanoic acid, compound with 2,2’,2’’-nitrilotriethanol and 6-(isononanoylamino)hexanoic acid, reliable tests demonstrate ready biodegradability. The 10 day-window was fulfilled in the respective tests.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Both, the key study performed with 6-(isononanoylamino)hexanoic acid, compound with 2,2’,2’’-nitrilotriethanol (reliability category 1) and the key study on 6-(isononanoylamino)hexanoic acid (reliability category 2) clearly demonstrate ready biodegradability (94% within 22 days and 98% within 28 days, respectively) in OECD 301 A-Tests (DOC Die-Away).

Additional tests on inherent biodegradability support these results. 6-(isononanoylamino)hexanoic acid, compound with 2,2’,2’’-nitrilotriethanol (97% within 11 days, RL1) and 6-(isononanoylamino)hexanoic acid (93% within 17 days; RL1) proved to be inherently biodegradable in Zahn-Wellens-tests (OECD 302 B). In both of the OECD 302 B-studies elimination due to adsorption was accounted for (determined however to be negligible).