Registration Dossier

Environmental fate & pathways

Adsorption / desorption

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Link to relevant study record(s)

Description of key information

In accordance with REACH Annex VIII, point 9.3.1 "Adsorption/desorption screening", column 2, as well as REACH Annex IX, point 9.3.3 "Further information on adsorption/desorption", column 2, the studies do not need to be conducted as the substance and its relevant degradation products degrade rapidly. However, information on adsorption/desorption is given for the major hydrolytical breakdown product, 2-ethyl-hexan-1-ol, which is relevant for assessing environmental fate and toxicity.
The Koc used in the risk assessment refers to the major breakdown product 2-ethyl-hexan-1-ol, determined by QSAR calculation.

Key value for chemical safety assessment

Koc at 20 °C:
35.28

Additional information

The log Koc for 2 -ethyl-hexan-1-ol was estimated by means of QSAR (KOCWIN v2.00) since experimental determination is not mandatory under REACH. This compound is the major hydrolytical degradation product of the parent substance bis(2-ethylhexyl)peroxydicarbonate and therefore relevant for the environmental risk assessment.

The Koc, estimated based on MCI, is relatively low (35.28 L/kg), indicating no significant adsorption tendency of the substance.