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A GLP study was conducted to OECD guideline 301B (CO2 evolution). Municiple activated sewage sludge was used at a content of 30mg dry matter/L. The reference substance was 86% degraded after 28days and was not significantly inhibited by the test substance thereby validating the test.

The mean biodegradation of the test substance first exceeded 10% after 3 days but did not exceed 60% (pass level for CO2 evolution test) after 13 days and therefore the 10 day window was not passed. However, the 60% pass level was exceeded within the 28 day test and therefore Capa oligomer can be considered as readily biodegradable.

In accordance with REACH Annex IX column 2, degradation simulation testing in water and/or sediment and in soil does not need to be conducted as the substance is readily biodegradable.

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