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Environmental fate & pathways

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A significant reduction of substance concentration was observed in the hydrolysis study (OECD Guideline 111) at all pH (4, 7 and 9). As the structure of the molecule does not account for a hydrolytical reaction, it is likely that the measured decay of solution concentrations is due to other phenomena such as adsorption or volatilisation.

Biodegradation data shows tert-dodecanethiol not to be readily biodegradable in an OECD 301D study and therefore is expected to persist in the environment (Jenkins 1990).

The bioconcentration factor (BCF) of this substance lies between 500 and 1950 L/kg. These values were derived from an OECD 305 study and other approaches under a WoE approach attached in the relevant RS in chapter 5.3.1..

Mollandin (2010), an adsorption study on soil/ sewage sludge using high performance liquid chromatography, gives a log Koc of 3.6, which indicates a strongly potential to adsorb on soil/sediment particles.