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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Biodegradation: ASA and the hydrolysis products can be regarded as readily biodegradable (CAS 28777-98-2)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable but failing 10-day window

Additional information

Because no test with 2,5-Furandione, dihydro-, mono-C15-20-alkenyl derivs on biodegradation is available, two test with the main constituent C18 ASA are assessed.

In a biodegradability test performed according to OECD Guideline 301 D, the test substance C18 ASA was hydrolized prior to application. Following O2 consumption, the test item did not cause a reduction in the endogenous respiration so that test substance was therefore considered to be non-inhibitory to the inoculum. As an outcome of this test, a biodegradation of 60 % of the test item in 28 days was found, so the test substance and its hydrolysis products can be regarded as ready biodegradable.

In a biodegradability test made according to OECD Guideline 301, 20 % of the C18 ASA was found to biodegraded in 29 days. However, the tested substance could be regarded as inherently biodegradable.

Since the tested substance C18 ASA is a main constituent of 2,5-Furandione, dihydro-, mono-C15-20-alkenyl derivs, the same outcome of the tests would be expected for 2,5-Furandione, dihydro-, mono-C15-20-alkenyl derivs .

Additionally, the test results can be also regarded valid for the hydrolysis products of C18 ASA and 2,5-Furandione, dihydro-, mono-C15-20-alkenyl derivs ., respectively, because the substances hydrolyse immediately upon contact with water.