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Environmental fate & pathways

Endpoint summary

Administrative data

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Additional information

Neither ready nor ultimate biodegradation of the test substance has been demonstrated in ready and inherent biodegradation studies. Inherent biodegradation, however, has been demonstrated in an OECD Guideline 302C study with the test substance. The test substance is structurally similar to 6:2 fluorotelomer sulfonate, 6:2 monosubstituted polyfluoroalkyl phosphate, and 8:2 fluorotelomer stearate. Studies published on these three substances (Wang et al. 2011, Lee et al., 2010, Dasu et al. 2012) demonstrate that the test substance will undergo cleavage of the ester linkage, resulting in production of 6:2 fluorotelomer alcohol. Additionally, Catalogic v5.11.5 shows that the first and most probable transformation of the test substance is a microbial catalysed hydrolysis reaction to form 6:2 fluorotelomer alcohol and methacrylic acid. The Catalogic model is an expert system capable of simulating microbial degradation. The test substance is 100% within the structural domain of the model. The 6:2 fluorotelomer alcohol will then follow the transformation pathway most recently elucidated by Zhao et al (2012). Furthermore, the transformation products determined by Zhao et al also mimic those simulated by the Catalogic model. 6:2 fluorotelomer alcohol also is 100% within the structural domain of the model. Higher tier biodegradation simulation testing and the identification of degradation products in activated sludge and aerobic soil and river sediments has been conducted on the structurally similar substance 6:2 FTOH.

 

Wang, N; Liu, J; Buck, R; Korzeniowski, S; Wolstenholme, B; Folsom, P; and Sulecki, L. 6:2 fluorotelomer sulfonate aerobic biotransformation in activated sludge of waste water treatment plants. Chemosphere 2011, 82, 853-858.

Lee, H; D’eon, J; and Maybury, S. Biodegradation of polyfluoralkyl phosphates as a source of perfluorinated acids to the environment. Enviro. Sci. Technol. 2010, 44, 3305-3310.

Dasu, K; Liu, J; and Lee, L. Aerobic soil biodegradation of 8:2 fluorotelomer stearate. Environ. Sci. Technol. 2012, 46, 3831-3836.