Registration Dossier

Environmental fate & pathways

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Description of key information

According to the key biodegradation study (OECD Guideline 301F with GLP compliance), even if the registered substance attained only 59% and 47% degradation after 28 days in the tests 1 and 3, the registered substance attained 65% degradation after 28 days without fulfilling the 10 -day window validation criteria in the test 2. According to the OECD Guidelines, a mixture containing isomers that are expected to degrade sequentially is not required to meet the 10 -day window obligations and therefore, as the degradation was greater than 60% after 28 days, the registered substance can be considered to be readily biodegradable. A positive biodegradability test is sometimes difficult to obtain because it's dependent on the quality of the inoculum used. Therefore, a positive result is sufficient to conclude on the readily biodegradation potential of the substance. This conclusion is supported by an additional study on an extremely similar source substance where clear ready biodegradability was observed.

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