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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Readily biodegradable: 70.8-75.7% (CO2 evolution) in 28 days (OECD 301B)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Five studies investigating the biodegradability of OPP (CAS-No. 90-43-7) are available. Ready biodegradability was tested in four studies. The key study was carried out according to OECD guideline 301 B and GLP compliance. Using domestic sludge a biodegradation of 70.8 – 75.7% after 28 days was observed (Gonsior and Tryska, 1997).

The rapid biodegradation of OPP is supported by the results of the three other biodegradation studies. These studies were performed according to OECD guideline 301 F, and EU method C.4-D, respectively. In the test conducted according to OECD guideline 301 F 100% biodegradation was reached between 6 and 9 days (Kanne, 1989). In the test following the procedures of the EU method C.4-D, 96% biodegradation after 28 days was observed (Painter, 1985).

An inherent biodegradation study, which was performed according to OECD guideline 302 B shows a DOC removal of 100% after 10 days (Wellens, 1990).

Based on the results above it can be concluded that OPP is readily biodegradable.     

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