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Environmental fate & pathways

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Transport and distribution tendency of the substance was studied in two different ways. Adsorption coefficient was determined according to the EU Method C.19 in a GLP compliant laboratory. Distribution modeling was performed with EQC Equilibrium Criterion Model 2.02 (Canadian Environmental Modelling Centre, 2003). Distribution modeling supported the test study, which indicated that the substance components have a tendency to sorb to sedimentary or soil organic carbon. The adsorption coefficient (Koc) was found to be 4.27x105 and logKoc was > 5.63. Over 99 % of the substance migrates to sediments when released in water whereas emissions to air leads to its appearance in sediment (71 %) and soil (27 %). Following release to soil, 98 % of the substance remains in soil.

Although the substance is an UVCB compound, the range and type of alkanes present is relatively constant with C14-C18 isoalkanes tending to predominate. Regarding the substance as a single complex substance is justified based on the fact that the main components present are from a single chemical group (alkanes). It is well known that hydrocarbons of similar structure will have similar physicochemical properties and environmental-degradation potentials, and they will also have similar distributions and fates within a given environment.