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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

readily biodegradable

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

4-Acetylmorpholine (CAS 1696-20-4) is readily biodegradable following a weight-of-evidence approach. In a Zahn-Wellens test (OECD 302B) with 4 -acetylmorpholine was determined to be inherently biodegradable. A ready biodegradable test (OECD 301A) with the structurally similar substance 4 -morpholinecarbaldehyde (CAS 4394 -85 -8) was determined to readily biodegradable according to OECD criteria.

The following results with 4-Acetylmorpholine and the structurally similar 4 -morpholinecarbaldehyde were considered:

- CAS 1696 -20 -4, 4 -acetylmorpholine: BASF AG (1992; Study No. 91/1665/10/1): OECD 302B, domestic activated sludge: 98% after 21 d (lag phase 5 to 6 d): inherently biodegradable

- CAS 4394 -85 -8, 4 -morpholinecarbaldehyde: BASF AG (1997). Study No. 96/0625/21/2: OECD 301A, domestic activated sludge: 96% in 21 d (lag phase: 14 d): readily biodegradable