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Environmental fate & pathways

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Biodegradation

The required pass level of degree of biodegradation of 60 % CO2/ThCO2 within 10 days was not reached, 54 % CO2/ThCO2 degradation at day 14 was measured. The degree of biodegradation after an exposure period of 28 days was 90 - 100 % CO2/ThCO2. The test item has a purity of 72 % and contains 28 % impurities. These impurities can contribute to a delayed degradation, thus, the 10-day window criterion is not relevant for a substance with different impurities. In addition, it is highly likely that at higher purity the test item will fulfill the set criterion for ready biodegradability as the obtained degradation at the end of the 10-day window was very close to the set criterion. As the test substance is only 72 % pure and contains big share of impurities, the 10-day window does not apply, therefore, the test item is considered as readily biodegradable.

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