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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The structural analogue substances methacrylic acid ester of an alcohol mixture with a mean C-number of 17.4 and octadecyl methacrylate proved to be readily biodegradable and were fulfilling the 10-d window criterion.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Octadecyl methacrylate (Fraunhofer 1988a) and (Institut Fresenius 1988), and methacrylic acid ester 17.4 (BMG 2008) demonstrated to be readily biodegradable in biodegadation tests acc. OECD 301 C, OECD 301 D and OECD 301 B (modified Sturm test). 79%, 80% and 97 % biodegradatíon were achieved within 28 days, respectively. The 10 day window criteria were fulfilled in all tests.

The long-chain alkyl methacrylate esters (C12 - C22) are all readily biodegradable. This was demonstrated in several guideline studies which cover the range of C12 to C18.