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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

A simulation study in surface water according OECD 309 was performed. Under test conditions no relevant degradation within 60 days was observed. Based on the identified uses as well as the results from the distribution modelling direct and/or indirect exposure of sediment and/or soil is not expected. Therefore no further testing is considered and the substance is assumed to be very persistent in the environment.

Key value for chemical safety assessment

Additional information

The mineralisation rate and route of degradation of [14C] - HAPS was investigatedin Calwich Abbey natural water system. The mean mass balance for all incubation groups was 98.32 % AR, this excludes the sterile vessels were recoveries were low, suspected due to a dosing issue. For the non-sterilised, viable test systems, parent compound was found to be stable with a mean of 93.49 % AR remaining at the end of the incubation period (61 DAT). For the sterilised samples, HAPS was found to be stable with 99.69 % AR (mean) remaining at 61 DAT.