Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

alpha-D-Glucopyranoside, beta-D-fructofuranosyl, mono- and didodecanoate esters is characterized by low vapour pressure (1.07 x 10^-28 to 8.33 x 10^-20 Pa) and a high estimated log Koc (3.0190 -3.0388 (mono-ester), 5.0551 -5.0948 (di-ester), KOCWIN v2.00). Experimental results from a standard biodegradation study indicate that the substance is readily biodegradable according to guideline criteria. Thus, abiotic degradation via hydrolysis is not considered to be a relevant degradation pathway. Furthermore, due to the low vapour pressure, the substance is not likely to evaporate into the atmospheric compartment and phototransformation in air is therefore not expected to be a relevant environmental fate pathway either.

According to the Guidance on information requirements and chemical safety assessment, Chapter R.7b, readily biodegradable substances can be expected to undergo rapid and ultimate degradation in most environments, including biological sewage treatment plants (STPs) (ECHA, 2017). Due to the ready biodegradability and the high potential for adsorption, the substance can be effectively removed in conventional STPs by biodegradation and sorption to biomass. Therefore, only negligible concentrations of the substance are likely to be released into the aquatic environment through conventional STPs, if at all. Whatever fraction is released will undergo extensive biodegradation and will preferentially distribute into the sediment compartment through sorption to organic matter, leading to a rapid reduction of the bioavailability of the substance in the water column.

In summary, only negligible concentrations of the substance are likely to be released into the environment through conventional STPs, if at all, and whatever fraction is released will preferentially distribute into the sediment compartment. The bioavailability of the substance in the sediment is presumably very low based on the physico-chemical properties of the substance (i.e. strong binding properties). In conclusion, the available information is sufficient to cover thedata requirements set out in Regulation (EC) No 1907/2006, Annex VIII.