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Environmental fate & pathways

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Based on the results of two OECD ready biodegradation tests conducted with the read across substance ethylparaben (CAS No. 120 -47 -8) the substance can be classified as readily biodegradable.

Ethylparaben is determined to be readily biodegradable (88.4% after 28 days) according to OECD criteria. Further simulation tests investigating the biodegradation in water, sediment and soil according to Regulation (EC) No. 1907/2006, column 2, 9.2.1.2 - 9.2.1.4, were not conducted since the substance is readily biodegradable.

This read across approach is in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5. Grouping of substance and read across approach as is explained within the analogue justification in section 13. Except for different cations (hydrogen vs. sodium) the anions of both the source and target substance have identical chemical structures. Since dissociation of the sodium salt under environmental conditions (pH 4 - 9) yields the same ionic species as the acidic form of the substance, this read across can be considered as justified.

The substance is thus considered to be rapidly degraded by both aquatic and terrestrial micro-organisms. Therefore, in accordance with Regulation (EC) No. 1907/2006, Annex IX 9.2.1.2 – 9.2.1.4, further simulation testing for water and sediment or soil biodegradation testing is not necessary.