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Abiotic degradation

The hydrolytic stability of the substance was investigated by Butler & White (2010) in accordance with EU Method C.7. Due to the complex nature of this UVCB substance it was not possible to calculate definitive half-lives of components within the test item, therefore the mean total peak area from the HPLC was calculated and used to provide qualitative information on degradation. The percentage of initial concentration of test item remaining in solution after 5 days at 50°C and at pH4 was 15.6%, at. pH7 was 75.8% and at pH9 was 75.2%. For the purpose of chemical safety assessment (environmental fate and behaviour), the substance will be assumed to be hydrolitically stable. Phototransformation studies are not a data requirement under Regulation (EC) 1907/2006 (REACH).

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