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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The adsorption / desorption of the test item was estimated by calculation of the log Koc with EPIWIN software using KOCWIN. A log Koc value of 0.7743 and a log Kow of 0.55 was calculated.Thus the test item can be considered that it is unlikely to have a potential for adsorption / desorption.

Key value for chemical safety assessment

Koc at 20 °C:
5.947

Additional information

In accordance with Column 2 adaptation statement of REACH Regulation No 1907/2006 Annex VIII and IX, adsorption/desorption screening and further studies on adsorption/desorption, information requirements 9.3.1 and 9.3.3, may be omitted since the log Kow value for the test substance is <3.0 (CSR sections 1.3 and 4.2.1) and has low potential for adsorption. The log Kow for 4-Hydroxy TEMPO was calculated using EPIWIN software to be 0.56. The log Koc value was calculated to be 0.7743 based on the log Kow and using KOCWIN. The test item is unlikely to have a potential for adsorption / desorption.