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Environmental fate & pathways

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Two Klimisch-1-rated studies were carried out on ready biodegradability in water, i.e. a CO2 evolution test (1996) and a manometric respirometry test. Whereas the grade of biodegradability from of the CO2 evolution test was 51 %, and thus failed slightly the 60% degradability criteria for ready biodegradability, the study with the manometric respirometer revealed a grade of degradability of 94%, thus the substance clearly was ready biodegradable. Therefore, in accordance with the weight of evidence approach, undecylenic acid is classified as readily biodegradable.