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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The ready biodegradation of PEMP product was investigated according to OECD guideline 301B and GLP principles. No significant biodegradation of PEMP product was observed (3% after 28d) and the substance was concluded to be not readily biodegradable under the conditions of the modified Sturm test. The study was considered to be reliable without restrictions.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradation of PEMP product in water under the conditions of the carbon dioxide (CO2) evolution test (modified Sturm test) was investigated according to OECD guideline 301B and GLP principles. A single test concentration of 28 mg/L (12 mg/L as TOC) was tested during 28 days.

No significant biodegradation of PEMP product was observed (3% after 28d). Therefore it is concluded that the substance was not readily biodegradable under the conditions of the modified Sturm test.

In the toxicity control more than 25% biodegradation occurred within 14 days (32%, based on ThCO2), indicating that the test substance does not inhibit microbial activity at a nominal concentration of 28 mg/L.

The study is considered to be reliable without restrictions.