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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Under the conditions of this study, the adsorption coefficient of the test material was determined to be >4.27 x 10⁵. The log10 Koc of the test material was determined to be >5.63.

Key value for chemical safety assessment

Koc at 20 °C:
427 000

Additional information

The adsorption coefficient of the test material was determined in the key study using the HPLC screening method, conducted in accordance with the standardised guidelines OECD 121 and EU Method C.19 under GLP conditions. It was assigned a reliability score of 1 in accordance with the criteria detailed by Klimisch (1997).

The adsorption coefficient was determined by comparison of the test material’s elution time from a reverse-phase column with those of standard reference materials.

Under the conditions of this study, the adsorption coefficient of the test material was determined to be >4.27 x 10⁵. The log10 Koc of the test material was determined to be >5.63.

Column 1 of Annex IX of Regulation (EC) No. 1907/2006 (REACH) states that the requirement to provide further information on the adsorption/desorption of the substance is dependent on the results of the study required in Annex VIII. The information generated to fulfil the Annex VIII endpoint is considered to adequately assess the fate and behaviour of the substance in the environment. On this basis, the Registrant considers it justified to omit the study required under point 9.3.3 of Annex IX.

[LogKoc: 5.63]