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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Two studies performed according to the OECD 301D guideline are available. After 28 days, the biodegradability was 78% and 83% for the multi-constituents containing respectively 4% and 2% TPP.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Two ready biodegradability tests in which biodegradability was measured in an aerobic aqueous medium were performed, one study with Fyrquel EHC PLUS (van Ginkel 2012a) and another study with Fyrquel EHC PLUS (low TPP) (van Ginkel 2012b) as test substance. The ready biodegradability test was performed in the closed bottle test according to OECD 301 D guideline.

Both test substances did not cause a reduction in the endogenous respiration and are therefore considered to be non-inhibitory to the inoculum. Fyrquel EHC PLUS and Fyrquel EHC PLUS (low TPP) were respectively biodegraded by 78% and 83% at day 28 in the closed bottle test and the validity criteria were fulfilled. Hence, both substances should be classified as readily biodegradable.