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Environmental fate & pathways

Biodegradation in soil

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Description of key information

Persistence in the soil compartment is not expected

Key value for chemical safety assessment

Additional information

According to the REACH regulation Annex IX column 2, studies on the biodegradation in soil do not need to be conducted if the test item is readily biodegradable.

However, additional data obtained from a test according to OECD guideline 307 conducted by Fliege (2005) to investigate the route and rate of OPP degradation are available. In this test the biotransformation of radiolabelled OPP was monitored over 127 days in soil under aerobic conditions. The simple first order DT50 value of OPP in the test soil was 2.7 h.

In conclusion, OPP is not expected to persist in the soil compartment.