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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Based on results of the structural analogue acrylic acid, sodium acrylate is readily biodegradable.

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The biodegradability of sodium acrylate is based on investigations in several batch tests of the structural analogue acrylic acid.

A closed bottle test was conducted according to OECD 301D and GLP regulations. The inoculum used in this study was a supernatant obtained by filtering activated sludge from the aeration stage of a sewage treatment plant treating predominantly domestic sewage. Acrylic acid attained 81 % biodegradation (O2 consumption) within 28 days. The pass level of 60 % was reached within 10 days. In a DOC-Die-Away assay according to 92/69/EEC, part II, C.4-A and GLP acrylic acid was readily biodegradable reaching 95 % DOC removal within 9 days. In conclusion, based on these results sodium acrylate is readily biodegradable, too.